257094407 has 4 divisors (see below), whose sum is σ = 258217320. Its totient is φ = 255971496.

The previous prime is 257094403. The next prime is 257094433. The reversal of 257094407 is 704490752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 257094407 - 2² = 257094403 is a prime.

It is a super-2 number, since 2×257094407² = 132195068221363298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257094403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561113 + ... + 561570.

It is an arithmetic number, because the mean of its divisors is an integer number (64554330).

Almost surely, 2^257094407 is an apocalyptic number.

257094407 is a deficient number, since it is larger than the sum of its proper divisors (1122913).

257094407 is a wasteful number, since it uses less digits than its factorization.

257094407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122912.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 257094407 is about 16034.1637449541. The cubic root of 257094407 is about 635.8639588449.

The spelling of 257094407 in words is "two hundred fifty-seven million, ninety-four thousand, four hundred seven".