167139972 has 36 divisors (see below), whose sum is σ = 436124416. Its totient is φ = 53915760.

The previous prime is 167139961. The next prime is 167139977. The reversal of 167139972 is 279931761.

167139972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (167139977) 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, 73768 + ... + 75999.

Almost surely, 2^167139972 is an apocalyptic number.

167139972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

167139972 is an abundant number, since it is smaller than the sum of its proper divisors (268984444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

167139972 is a wasteful number, since it uses less digits than its factorization.

167139972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149808 (or 149803 counting only the distinct ones).

The product of its digits is 142884, while the sum is 45.

The square root of 167139972 is about 12928.2625282750. The cubic root of 167139972 is about 550.8416557241.

The spelling of 167139972 in words is "one hundred sixty-seven million, one hundred thirty-nine thousand, nine hundred seventy-two".