257672803 has 4 divisors (see below), whose sum is σ = 262534608. Its totient is φ = 252811000.

The previous prime is 257672797. The next prime is 257672809. The reversal of 257672803 is 308276752.

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

It is an interprime number because it is at equal distance from previous prime (257672797) and next prime (257672809).

It is a cyclic number.

It is not a de Polignac number, because 257672803 - 2⁵ = 257672771 is a prime.

It is a super-3 number, since 3×257672803³ (a number of 26 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257672809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2430823 + ... + 2430928.

It is an arithmetic number, because the mean of its divisors is an integer number (65633652).

Almost surely, 2^257672803 is an apocalyptic number.

257672803 is a deficient number, since it is larger than the sum of its proper divisors (4861805).

257672803 is an equidigital number, since it uses as much as digits as its factorization.

257672803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4861804.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 257672803 is about 16052.1899752028. The cubic root of 257672803 is about 636.3404449143.

The spelling of 257672803 in words is "two hundred fifty-seven million, six hundred seventy-two thousand, eight hundred three".