255955949 has 2 divisors, whose sum is σ = 255955950. Its totient is φ = 255955948.

The previous prime is 255955913. The next prime is 255955951. The reversal of 255955949 is 949559552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248283049 + 7672900 = 15757^2 + 2770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255955949 is a prime.

It is a Sophie Germain prime.

Together with 255955951, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 255955949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255955969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127977974 + 127977975.

It is an arithmetic number, because the mean of its divisors is an integer number (127977975).

Almost surely, 2^255955949 is an apocalyptic number.

It is an amenable number.

255955949 is a deficient number, since it is larger than the sum of its proper divisors (1).

255955949 is an equidigital number, since it uses as much as digits as its factorization.

255955949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3645000, while the sum is 53.

The square root of 255955949 is about 15998.6233470258. The cubic root of 255955949 is about 634.9239985920.

The spelling of 255955949 in words is "two hundred fifty-five million, nine hundred fifty-five thousand, nine hundred forty-nine".