257643094 has 4 divisors (see below), whose sum is σ = 386464644. Its totient is φ = 128821546.

The previous prime is 257643037. The next prime is 257643103. The reversal of 257643094 is 490346752.

It is a happy number.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64410772 + ... + 64410775.

It is an arithmetic number, because the mean of its divisors is an integer number (96616161).

Almost surely, 2^257643094 is an apocalyptic number.

257643094 is a deficient number, since it is larger than the sum of its proper divisors (128821550).

257643094 is a wasteful number, since it uses less digits than its factorization.

257643094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128821549.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 257643094 is about 16051.2645607753. The cubic root of 257643094 is about 636.3159878448.

The spelling of 257643094 in words is "two hundred fifty-seven million, six hundred forty-three thousand, ninety-four".