255379973 has 2 divisors, whose sum is σ = 255379974. Its totient is φ = 255379972.

The previous prime is 255379963. The next prime is 255379981. The reversal of 255379973 is 379973552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135652609 + 119727364 = 11647^2 + 10942^2 .

It is a cyclic number.

It is not a de Polignac number, because 255379973 - 2²⁴ = 238602757 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255379963) 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, 127689986 + 127689987.

It is an arithmetic number, because the mean of its divisors is an integer number (127689987).

Almost surely, 2^255379973 is an apocalyptic number.

It is an amenable number.

255379973 is a deficient number, since it is larger than the sum of its proper divisors (1).

255379973 is an equidigital number, since it uses as much as digits as its factorization.

255379973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1786050, while the sum is 50.

The square root of 255379973 is about 15980.6124100424. The cubic root of 255379973 is about 634.4473857980.

The spelling of 255379973 in words is "two hundred fifty-five million, three hundred seventy-nine thousand, nine hundred seventy-three".