6900649 has 4 divisors (see below), whose sum is σ = 7886464. Its totient is φ = 5914836.

The previous prime is 6900643. The next prime is 6900659. The reversal of 6900649 is 9460096.

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 not a de Polignac number, because 6900649 - 2¹¹ = 6898601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6900643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 492897 + ... + 492910.

It is an arithmetic number, because the mean of its divisors is an integer number (1971616).

Almost surely, 2^6900649 is an apocalyptic number.

It is an amenable number.

6900649 is a deficient number, since it is larger than the sum of its proper divisors (985815).

6900649 is an equidigital number, since it uses as much as digits as its factorization.

6900649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985814.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 6900649 is about 2626.9086394468. The cubic root of 6900649 is about 190.3837948599.

The spelling of 6900649 in words is "six million, nine hundred thousand, six hundred forty-nine".