257385673 has 8 divisors (see below), whose sum is σ = 260447616. Its totient is φ = 254334000.

The previous prime is 257385641. The next prime is 257385683. The reversal of 257385673 is 376583752.

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 257385673 - 2⁵ = 257385641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257385683) 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, 55440 + ... + 59902.

It is an arithmetic number, because the mean of its divisors is an integer number (32555952).

Almost surely, 2^257385673 is an apocalyptic number.

It is an amenable number.

257385673 is a deficient number, since it is larger than the sum of its proper divisors (3061943).

257385673 is a wasteful number, since it uses less digits than its factorization.

257385673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5135.

The product of its digits is 1058400, while the sum is 46.

The square root of 257385673 is about 16043.2438428143. The cubic root of 257385673 is about 636.1039947359.

The spelling of 257385673 in words is "two hundred fifty-seven million, three hundred eighty-five thousand, six hundred seventy-three".