507994991 has 16 divisors (see below), whose sum is σ = 595085568. Its totient is φ = 424569600.

The previous prime is 507994987. The next prime is 507995011. The reversal of 507994991 is 199499705.

It is not a de Polignac number, because 507994991 - 2² = 507994987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (507996991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243071 + ... + 245151.

It is an arithmetic number, because the mean of its divisors is an integer number (37192848).

Almost surely, 2^507994991 is an apocalyptic number.

507994991 is a deficient number, since it is larger than the sum of its proper divisors (87090577).

507994991 is a wasteful number, since it uses less digits than its factorization.

507994991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2942.

The product of its (nonzero) digits is 918540, while the sum is 53.

The square root of 507994991 is about 22538.7442196765. The cubic root of 507994991 is about 797.9085951089.

The spelling of 507994991 in words is "five hundred seven million, nine hundred ninety-four thousand, nine hundred ninety-one".