257989323 has 4 divisors (see below), whose sum is σ = 343985768. Its totient is φ = 171992880.

The previous prime is 257989289. The next prime is 257989337. The reversal of 257989323 is 323989752.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 257989323 - 2⁹ = 257988811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257984323) 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, 42998218 + ... + 42998223.

It is an arithmetic number, because the mean of its divisors is an integer number (85996442).

Almost surely, 2^257989323 is an apocalyptic number.

257989323 is a deficient number, since it is larger than the sum of its proper divisors (85996445).

257989323 is an equidigital number, since it uses as much as digits as its factorization.

257989323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85996444.

The product of its digits is 816480, while the sum is 48.

The square root of 257989323 is about 16062.0460402777. The cubic root of 257989323 is about 636.6008941615.

The spelling of 257989323 in words is "two hundred fifty-seven million, nine hundred eighty-nine thousand, three hundred twenty-three".