257675489 has 8 divisors (see below), whose sum is σ = 259858368. Its totient is φ = 255500560.

The previous prime is 257675461. The next prime is 257675497. The reversal of 257675489 is 984576752.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257675489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 257675489.

It is not an unprimeable number, because it can be changed into a prime (257675459) 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, 75314 + ... + 78660.

It is an arithmetic number, because the mean of its divisors is an integer number (32482296).

Almost surely, 2^257675489 is an apocalyptic number.

It is an amenable number.

257675489 is a deficient number, since it is larger than the sum of its proper divisors (2182879).

257675489 is a wasteful number, since it uses less digits than its factorization.

257675489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3975.

The product of its digits is 4233600, while the sum is 53.

The square root of 257675489 is about 16052.2736395814. The cubic root of 257675489 is about 636.3426559929.

The spelling of 257675489 in words is "two hundred fifty-seven million, six hundred seventy-five thousand, four hundred eighty-nine".