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6990941 = 52313367
BaseRepresentation
bin11010101010110001011101
3111011011202202
4122222301131
53242202231
6405501245
7113264516
oct32526135
914134682
106990941
113a45441
122411825
1315aa069
14cdda0d
159315cb
hex6aac5d

6990941 has 4 divisors (see below), whose sum is σ = 7004832. Its totient is φ = 6977052.

The previous prime is 6990923. The next prime is 6990953. The reversal of 6990941 is 1490996.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-6990941 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6990895 and 6990904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6990901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6161 + ... + 7206.

It is an arithmetic number, because the mean of its divisors is an integer number (1751208).

Almost surely, 26990941 is an apocalyptic number.

It is an amenable number.

6990941 is a deficient number, since it is larger than the sum of its proper divisors (13891).

6990941 is a wasteful number, since it uses less digits than its factorization.

6990941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13890.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 6990941 is about 2644.0387667355. The cubic root of 6990941 is about 191.2105624464.

Subtracting from 6990941 its reverse (1490996), we obtain a palindrome (5499945).

The spelling of 6990941 in words is "six million, nine hundred ninety thousand, nine hundred forty-one".

Divisors: 1 523 13367 6990941