256797371 has 2 divisors, whose sum is σ = 256797372. Its totient is φ = 256797370.

The previous prime is 256797337. The next prime is 256797383. The reversal of 256797371 is 173797652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256797371 - 2¹⁰ = 256796347 is a prime.

It is not a weakly prime, because it can be changed into another prime (256797301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128398685 + 128398686.

It is an arithmetic number, because the mean of its divisors is an integer number (128398686).

Almost surely, 2^256797371 is an apocalyptic number.

256797371 is a deficient number, since it is larger than the sum of its proper divisors (1).

256797371 is an equidigital number, since it uses as much as digits as its factorization.

256797371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 555660, while the sum is 47.

The square root of 256797371 is about 16024.8984708172. The cubic root of 256797371 is about 635.6189810369.

The spelling of 256797371 in words is "two hundred fifty-six million, seven hundred ninety-seven thousand, three hundred seventy-one".