255863977 has 2 divisors, whose sum is σ = 255863978. Its totient is φ = 255863976.

The previous prime is 255863969. The next prime is 255863989. The reversal of 255863977 is 779368552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232593001 + 23270976 = 15251^2 + 4824^2 .

It is a cyclic number.

It is not a de Polignac number, because 255863977 - 2³ = 255863969 is a prime.

It is not a weakly prime, because it can be changed into another prime (255863947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127931988 + 127931989.

It is an arithmetic number, because the mean of its divisors is an integer number (127931989).

Almost surely, 2^255863977 is an apocalyptic number.

It is an amenable number.

255863977 is a deficient number, since it is larger than the sum of its proper divisors (1).

255863977 is an equidigital number, since it uses as much as digits as its factorization.

255863977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3175200, while the sum is 52.

The square root of 255863977 is about 15995.7487164559. The cubic root of 255863977 is about 634.8479409397.

The spelling of 255863977 in words is "two hundred fifty-five million, eight hundred sixty-three thousand, nine hundred seventy-seven".