255746399 has 2 divisors, whose sum is σ = 255746400. Its totient is φ = 255746398.

The previous prime is 255746383. The next prime is 255746401. The reversal of 255746399 is 993647552.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255746399 - 2⁴ = 255746383 is a prime.

Together with 255746401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255746339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127873199 + 127873200.

It is an arithmetic number, because the mean of its divisors is an integer number (127873200).

Almost surely, 2^255746399 is an apocalyptic number.

255746399 is a deficient number, since it is larger than the sum of its proper divisors (1).

255746399 is an equidigital number, since it uses as much as digits as its factorization.

255746399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2041200, while the sum is 50.

The square root of 255746399 is about 15992.0730050860. The cubic root of 255746399 is about 634.7506814650.

The spelling of 255746399 in words is "two hundred fifty-five million, seven hundred forty-six thousand, three hundred ninety-nine".