508972991 has 4 divisors (see below), whose sum is σ = 509397984. Its totient is φ = 508548000.

The previous prime is 508972987. The next prime is 508973029. The reversal of 508972991 is 199279805.

It is a happy number.

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 508972991 - 2² = 508972987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (508972921) 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, 210695 + ... + 213096.

It is an arithmetic number, because the mean of its divisors is an integer number (127349496).

Almost surely, 2^508972991 is an apocalyptic number.

508972991 is a deficient number, since it is larger than the sum of its proper divisors (424993).

508972991 is a wasteful number, since it uses less digits than its factorization.

508972991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424992.

The product of its (nonzero) digits is 408240, while the sum is 50.

The square root of 508972991 is about 22560.4297609775. The cubic root of 508972991 is about 798.4203156121.

The spelling of 508972991 in words is "five hundred eight million, nine hundred seventy-two thousand, nine hundred ninety-one".