257094986 has 4 divisors (see below), whose sum is σ = 385642482. Its totient is φ = 128547492.

The previous prime is 257094983. The next prime is 257094991. The reversal of 257094986 is 689490752.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 224250625 + 32844361 = 14975^2 + 5731^2 .

It is not an unprimeable number, because it can be changed into a prime (257094983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64273745 + ... + 64273748.

Almost surely, 2^257094986 is an apocalyptic number.

257094986 is a deficient number, since it is larger than the sum of its proper divisors (128547496).

257094986 is a wasteful number, since it uses less digits than its factorization.

257094986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128547495.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 257094986 is about 16034.1818001418. The cubic root of 257094986 is about 635.8644361857.

The spelling of 257094986 in words is "two hundred fifty-seven million, ninety-four thousand, nine hundred eighty-six".