257064983 has 8 divisors (see below), whose sum is σ = 294259200. Its totient is φ = 219988440.

The previous prime is 257064971. The next prime is 257064991. The reversal of 257064983 is 389460752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 257064983 - 2¹⁸ = 256802839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257064923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24683 + ... + 33516.

It is an arithmetic number, because the mean of its divisors is an integer number (36782400).

Almost surely, 2^257064983 is an apocalyptic number.

257064983 is a deficient number, since it is larger than the sum of its proper divisors (37194217).

257064983 is an equidigital number, since it uses as much as digits as its factorization.

257064983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58837.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 257064983 is about 16033.2461778643. The cubic root of 257064983 is about 635.8397000844.

The spelling of 257064983 in words is "two hundred fifty-seven million, sixty-four thousand, nine hundred eighty-three".