167940109 has 4 divisors (see below), whose sum is σ = 168661116. Its totient is φ = 167219104.

The previous prime is 167940079. The next prime is 167940169. The reversal of 167940109 is 901049761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 111239209 + 56700900 = 10547^2 + 7530^2 .

It is a cyclic number.

It is not a de Polignac number, because 167940109 - 2²⁵ = 134385677 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 (167940169) 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, 360154 + ... + 360619.

It is an arithmetic number, because the mean of its divisors is an integer number (42165279).

Almost surely, 2^167940109 is an apocalyptic number.

It is an amenable number.

167940109 is a deficient number, since it is larger than the sum of its proper divisors (721007).

167940109 is an equidigital number, since it uses as much as digits as its factorization.

167940109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721006.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 167940109 is about 12959.1708453898. The cubic root of 167940109 is about 551.7192581465.

The spelling of 167940109 in words is "one hundred sixty-seven million, nine hundred forty thousand, one hundred nine".