257363 has 4 divisors (see below), whose sum is σ = 272520. Its totient is φ = 242208.

The previous prime is 257353. The next prime is 257371. The reversal of 257363 is 363752.

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 257363 - 2⁸ = 257107 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 (257353) 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, 7553 + ... + 7586.

It is an arithmetic number, because the mean of its divisors is an integer number (68130).

2²⁵⁷³⁶³ is an apocalyptic number.

257363 is a deficient number, since it is larger than the sum of its proper divisors (15157).

257363 is a wasteful number, since it uses less digits than its factorization.

257363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15156.

The product of its digits is 3780, while the sum is 26.

The square root of 257363 is about 507.3095701837. The cubic root of 257363 is about 63.6085316139.

The spelling of 257363 in words is "two hundred fifty-seven thousand, three hundred sixty-three".