256975937 has 2 divisors, whose sum is σ = 256975938. Its totient is φ = 256975936.

The previous prime is 256975921. The next prime is 256975949. The reversal of 256975937 is 739579652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235806736 + 21169201 = 15356^2 + 4601^2 .

It is a cyclic number.

It is not a de Polignac number, because 256975937 - 2⁴ = 256975921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256975967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128487968 + 128487969.

It is an arithmetic number, because the mean of its divisors is an integer number (128487969).

Almost surely, 2^256975937 is an apocalyptic number.

It is an amenable number.

256975937 is a deficient number, since it is larger than the sum of its proper divisors (1).

256975937 is an equidigital number, since it uses as much as digits as its factorization.

256975937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3572100, while the sum is 53.

The square root of 256975937 is about 16030.4690199632. The cubic root of 256975937 is about 635.7662743951.

The spelling of 256975937 in words is "two hundred fifty-six million, nine hundred seventy-five thousand, nine hundred thirty-seven".