257380797 has 8 divisors (see below), whose sum is σ = 343252800. Its totient is φ = 171548000.

The previous prime is 257380709. The next prime is 257380807. The reversal of 257380797 is 797083752.

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

It is a cyclic number.

It is not a de Polignac number, because 257380797 - 2¹² = 257376701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257380397) 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, 13297 + ... + 26297.

It is an arithmetic number, because the mean of its divisors is an integer number (42906600).

Almost surely, 2^257380797 is an apocalyptic number.

It is an amenable number.

257380797 is a deficient number, since it is larger than the sum of its proper divisors (85872003).

257380797 is a wasteful number, since it uses less digits than its factorization.

257380797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19603.

The product of its (nonzero) digits is 740880, while the sum is 48.

The square root of 257380797 is about 16043.0918778146. The cubic root of 257380797 is about 636.0999778551.

The spelling of 257380797 in words is "two hundred fifty-seven million, three hundred eighty thousand, seven hundred ninety-seven".