255923761 has 2 divisors, whose sum is σ = 255923762. Its totient is φ = 255923760.

The previous prime is 255923687. The next prime is 255923771. The reversal of 255923761 is 167329552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244734736 + 11189025 = 15644^2 + 3345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255923761 is a prime.

It is not a weakly prime, because it can be changed into another prime (255923771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127961880 + 127961881.

It is an arithmetic number, because the mean of its divisors is an integer number (127961881).

Almost surely, 2^255923761 is an apocalyptic number.

It is an amenable number.

255923761 is a deficient number, since it is larger than the sum of its proper divisors (1).

255923761 is an equidigital number, since it uses as much as digits as its factorization.

255923761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 40.

The square root of 255923761 is about 15997.6173538437. The cubic root of 255923761 is about 634.8973823057.

The spelling of 255923761 in words is "two hundred fifty-five million, nine hundred twenty-three thousand, seven hundred sixty-one".