67979871 has 16 divisors (see below), whose sum is σ = 100876800. Its totient is φ = 45245304.

The previous prime is 67979839. The next prime is 67979887. The reversal of 67979871 is 17897976.

It is not a de Polignac number, because 67979871 - 2⁵ = 67979839 is a prime.

It is a super-2 number, since 2×67979871² = 9242525722353282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67979371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18250 + ... + 21656.

It is an arithmetic number, because the mean of its divisors is an integer number (6304800).

Almost surely, 2^67979871 is an apocalyptic number.

67979871 is a deficient number, since it is larger than the sum of its proper divisors (32896929).

67979871 is a wasteful number, since it uses less digits than its factorization.

67979871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4155 (or 4149 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 54.

The square root of 67979871 is about 8244.9906610014. The cubic root of 67979871 is about 408.1252318860.

The spelling of 67979871 in words is "sixty-seven million, nine hundred seventy-nine thousand, eight hundred seventy-one".