7656731 has 2 divisors, whose sum is σ = 7656732. Its totient is φ = 7656730.

The previous prime is 7656713. The next prime is 7656763. The reversal of 7656731 is 1376567.

Together with previous prime (7656713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (1376567) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7656731 is a prime.

It is a super-2 number, since 2×7656731² = 117251059212722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7656691 and 7656700.

It is not a weakly prime, because it can be changed into another prime (7656331) 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 as a sum of consecutive naturals, namely, 3828365 + 3828366.

It is an arithmetic number, because the mean of its divisors is an integer number (3828366).

Almost surely, 2^7656731 is an apocalyptic number.

7656731 is a deficient number, since it is larger than the sum of its proper divisors (1).

7656731 is an equidigital number, since it uses as much as digits as its factorization.

7656731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 35.

The square root of 7656731 is about 2767.0798687425. The cubic root of 7656731 is about 197.0975064215.

The spelling of 7656731 in words is "seven million, six hundred fifty-six thousand, seven hundred thirty-one".