256072877 has 2 divisors, whose sum is σ = 256072878. Its totient is φ = 256072876.

The previous prime is 256072841. The next prime is 256072909. The reversal of 256072877 is 778270652.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222188836 + 33884041 = 14906^2 + 5821^2 .

It is a cyclic number.

It is not a de Polignac number, because 256072877 - 2¹² = 256068781 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256072807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128036438 + 128036439.

It is an arithmetic number, because the mean of its divisors is an integer number (128036439).

Almost surely, 2^256072877 is an apocalyptic number.

It is an amenable number.

256072877 is a deficient number, since it is larger than the sum of its proper divisors (1).

256072877 is an equidigital number, since it uses as much as digits as its factorization.

256072877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 329280, while the sum is 44.

The square root of 256072877 is about 16002.2772441925. The cubic root of 256072877 is about 635.0206676886.

The spelling of 256072877 in words is "two hundred fifty-six million, seventy-two thousand, eight hundred seventy-seven".