507168981 has 12 divisors (see below), whose sum is σ = 799175520. Its totient is φ = 307375080.

The previous prime is 507168971. The next prime is 507169009. The reversal of 507168981 is 189861705.

507168981 is a `hidden beast` number, since 507 + 1 + 68 + 9 + 81 = 666.

It is not a de Polignac number, because 507168981 - 2⁶ = 507168917 is a prime.

It is a super-2 number, since 2×507168981² = 514440750577156722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (507168901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2561361 + ... + 2561558.

It is an arithmetic number, because the mean of its divisors is an integer number (66597960).

Almost surely, 2^507168981 is an apocalyptic number.

It is an amenable number.

507168981 is a deficient number, since it is larger than the sum of its proper divisors (292006539).

507168981 is a wasteful number, since it uses less digits than its factorization.

507168981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5122936 (or 5122933 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The square root of 507168981 is about 22520.4125406263. The cubic root of 507168981 is about 797.4758887244.

The spelling of 507168981 in words is "five hundred seven million, one hundred sixty-eight thousand, nine hundred eighty-one".