256953091 has 2 divisors, whose sum is σ = 256953092. Its totient is φ = 256953090.

The previous prime is 256953041. The next prime is 256953101. The reversal of 256953091 is 190359652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256953091 - 2¹³ = 256944899 is a prime.

It is not a weakly prime, because it can be changed into another prime (256953041) 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, 128476545 + 128476546.

It is an arithmetic number, because the mean of its divisors is an integer number (128476546).

Almost surely, 2^256953091 is an apocalyptic number.

256953091 is a deficient number, since it is larger than the sum of its proper divisors (1).

256953091 is an equidigital number, since it uses as much as digits as its factorization.

256953091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72900, while the sum is 40.

The square root of 256953091 is about 16029.7564236017. The cubic root of 256953091 is about 635.7474332708.

The spelling of 256953091 in words is "two hundred fifty-six million, nine hundred fifty-three thousand, ninety-one".