257020711 has 2 divisors, whose sum is σ = 257020712. Its totient is φ = 257020710.

The previous prime is 257020703. The next prime is 257020723. The reversal of 257020711 is 117020752.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257020711 - 2³ = 257020703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257024711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128510355 + 128510356.

It is an arithmetic number, because the mean of its divisors is an integer number (128510356).

Almost surely, 2^257020711 is an apocalyptic number.

257020711 is a deficient number, since it is larger than the sum of its proper divisors (1).

257020711 is an equidigital number, since it uses as much as digits as its factorization.

257020711 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 257020711 is about 16031.8654872102. The cubic root of 257020711 is about 635.8031963296.

The spelling of 257020711 in words is "two hundred fifty-seven million, twenty thousand, seven hundred eleven".