264872857 has 2 divisors, whose sum is σ = 264872858. Its totient is φ = 264872856.

The previous prime is 264872849. The next prime is 264872873. The reversal of 264872857 is 758278462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179051161 + 85821696 = 13381^2 + 9264^2 .

It is a cyclic number.

It is not a de Polignac number, because 264872857 - 2³ = 264872849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 264872857.

It is not a weakly prime, because it can be changed into another prime (264872887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132436428 + 132436429.

It is an arithmetic number, because the mean of its divisors is an integer number (132436429).

Almost surely, 2^264872857 is an apocalyptic number.

It is an amenable number.

264872857 is a deficient number, since it is larger than the sum of its proper divisors (1).

264872857 is an equidigital number, since it uses as much as digits as its factorization.

264872857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1505280, while the sum is 49.

The square root of 264872857 is about 16274.9149613754. The cubic root of 264872857 is about 642.2130879435.

The spelling of 264872857 in words is "two hundred sixty-four million, eight hundred seventy-two thousand, eight hundred fifty-seven".