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7090031 = 13545387
BaseRepresentation
bin11011000010111101101111
3111100012200202
4123002331233
53303340111
6411544115
7114156434
oct33027557
914305622
107090031
114002933
12245b03b
1316131b0
14d27b8b
15950b3b
hex6c2f6f

7090031 has 4 divisors (see below), whose sum is σ = 7635432. Its totient is φ = 6544632.

The previous prime is 7090009. The next prime is 7090043. The reversal of 7090031 is 1300907.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7090031 - 210 = 7089007 is a prime.

It is a super-2 number, since 2×70900312 = 100537079161922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7089985 and 7090012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7090001) 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, 272681 + ... + 272706.

It is an arithmetic number, because the mean of its divisors is an integer number (1908858).

Almost surely, 27090031 is an apocalyptic number.

7090031 is a deficient number, since it is larger than the sum of its proper divisors (545401).

7090031 is a wasteful number, since it uses less digits than its factorization.

7090031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545400.

The product of its (nonzero) digits is 189, while the sum is 20.

The square root of 7090031 is about 2662.7112122797. The cubic root of 7090031 is about 192.1097372535.

Adding to 7090031 its reverse (1300907), we get a palindrome (8390938).

The spelling of 7090031 in words is "seven million, ninety thousand, thirty-one".

Divisors: 1 13 545387 7090031