257634283 has 4 divisors (see below), whose sum is σ = 263918088. Its totient is φ = 251350480.

The previous prime is 257634271. The next prime is 257634287. The reversal of 257634283 is 382436752.

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 257634283 - 2¹³ = 257626091 is a prime.

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 Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257634287) 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, 3141841 + ... + 3141922.

It is an arithmetic number, because the mean of its divisors is an integer number (65979522).

Almost surely, 2^257634283 is an apocalyptic number.

257634283 is a deficient number, since it is larger than the sum of its proper divisors (6283805).

257634283 is an equidigital number, since it uses as much as digits as its factorization.

257634283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6283804.

The product of its digits is 241920, while the sum is 40.

The square root of 257634283 is about 16050.9900940721. The cubic root of 257634283 is about 636.3087340841.

The spelling of 257634283 in words is "two hundred fifty-seven million, six hundred thirty-four thousand, two hundred eighty-three".