257997363 has 8 divisors (see below), whose sum is σ = 370457808. Its totient is φ = 158767584.

The previous prime is 257997359. The next prime is 257997373. The reversal of 257997363 is 363799752.

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

It is not a de Polignac number, because 257997363 - 2² = 257997359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257997323) 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, 3307620 + ... + 3307697.

It is an arithmetic number, because the mean of its divisors is an integer number (46307226).

Almost surely, 2^257997363 is an apocalyptic number.

257997363 is a deficient number, since it is larger than the sum of its proper divisors (112460445).

257997363 is a wasteful number, since it uses less digits than its factorization.

257997363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6615333.

The product of its digits is 2143260, while the sum is 51.

The square root of 257997363 is about 16062.2963177747. The cubic root of 257997363 is about 636.6075071199.

The spelling of 257997363 in words is "two hundred fifty-seven million, nine hundred ninety-seven thousand, three hundred sixty-three".