756856913 has 2 divisors, whose sum is σ = 756856914. Its totient is φ = 756856912.

The previous prime is 756856799. The next prime is 756856931. The reversal of 756856913 is 319658657.

It is a happy number.

Together with next prime (756856931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 723771409 + 33085504 = 26903^2 + 5752^2 .

It is an emirp because it is prime and its reverse (319658657) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 756856913 - 2⁸ = 756856657 is a prime.

It is not a weakly prime, because it can be changed into another prime (756856943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 378428456 + 378428457.

It is an arithmetic number, because the mean of its divisors is an integer number (378428457).

Almost surely, 2^756856913 is an apocalyptic number.

It is an amenable number.

756856913 is a deficient number, since it is larger than the sum of its proper divisors (1).

756856913 is an equidigital number, since it uses as much as digits as its factorization.

756856913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1360800, while the sum is 50.

The square root of 756856913 is about 27511.0325687714. The cubic root of 756856913 is about 911.3207537376.

The spelling of 756856913 in words is "seven hundred fifty-six million, eight hundred fifty-six thousand, nine hundred thirteen".