257796673 has 4 divisors (see below), whose sum is σ = 269005248. Its totient is φ = 246588100.

The previous prime is 257796667. The next prime is 257796683. The reversal of 257796673 is 376697752.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257796673 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 257796673.

It is not an unprimeable number, because it can be changed into a prime (257796613) 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, 5604253 + ... + 5604298.

It is an arithmetic number, because the mean of its divisors is an integer number (67251312).

Almost surely, 2^257796673 is an apocalyptic number.

257796673 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

257796673 is a deficient number, since it is larger than the sum of its proper divisors (11208575).

257796673 is a wasteful number, since it uses less digits than its factorization.

257796673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11208574.

The product of its digits is 3333960, while the sum is 52.

The square root of 257796673 is about 16056.0478636556. The cubic root of 257796673 is about 636.4423970315.

The spelling of 257796673 in words is "two hundred fifty-seven million, seven hundred ninety-six thousand, six hundred seventy-three".