255474397 has 2 divisors, whose sum is σ = 255474398. Its totient is φ = 255474396.

The previous prime is 255474391. The next prime is 255474407. The reversal of 255474397 is 793474552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233814681 + 21659716 = 15291^2 + 4654^2 .

It is a cyclic number.

It is not a de Polignac number, because 255474397 - 2²³ = 247085789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255474391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127737198 + 127737199.

It is an arithmetic number, because the mean of its divisors is an integer number (127737199).

Almost surely, 2^255474397 is an apocalyptic number.

It is an amenable number.

255474397 is a deficient number, since it is larger than the sum of its proper divisors (1).

255474397 is an equidigital number, since it uses as much as digits as its factorization.

255474397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058400, while the sum is 46.

The square root of 255474397 is about 15983.5664668434. The cubic root of 255474397 is about 634.5255695300.

It can be divided in two parts, 255 and 474397, that multiplied together give a triangular number (120971235 = T₁₅₅₅₄).

The spelling of 255474397 in words is "two hundred fifty-five million, four hundred seventy-four thousand, three hundred ninety-seven".