508172971 has 4 divisors (see below), whose sum is σ = 530267472. Its totient is φ = 486078472.

The previous prime is 508172953. The next prime is 508172981. The reversal of 508172971 is 179271805.

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

It is a cyclic number.

It is not a de Polignac number, because 508172971 - 2⁵ = 508172939 is a prime.

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 (508172981) 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, 11047216 + ... + 11047261.

It is an arithmetic number, because the mean of its divisors is an integer number (132566868).

Almost surely, 2^508172971 is an apocalyptic number.

508172971 is a deficient number, since it is larger than the sum of its proper divisors (22094501).

508172971 is a wasteful number, since it uses less digits than its factorization.

508172971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22094500.

The product of its (nonzero) digits is 35280, while the sum is 40.

The square root of 508172971 is about 22542.6921861609. The cubic root of 508172971 is about 798.0017687245.

The spelling of 508172971 in words is "five hundred eight million, one hundred seventy-two thousand, nine hundred seventy-one".