137999166 has 64 divisors (see below), whose sum is σ = 317675520. Its totient is φ = 39674880.

The previous prime is 137999131. The next prime is 137999167. The reversal of 137999166 is 661999731.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137999167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58930 + ... + 61226.

It is an arithmetic number, because the mean of its divisors is an integer number (4963680).

Almost surely, 2^137999166 is an apocalyptic number.

137999166 is an abundant number, since it is smaller than the sum of its proper divisors (179676354).

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

137999166 is a wasteful number, since it uses less digits than its factorization.

137999166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2369.

The product of its digits is 551124, while the sum is 51.

The square root of 137999166 is about 11747.3046270198. The cubic root of 137999166 is about 516.7638842151.

The spelling of 137999166 in words is "one hundred thirty-seven million, nine hundred ninety-nine thousand, one hundred sixty-six".