137664939 has 4 divisors (see below), whose sum is σ = 183553256. Its totient is φ = 91776624.

The previous prime is 137664931. The next prime is 137664941. The reversal of 137664939 is 939466731.

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

It is not a de Polignac number, because 137664939 - 2³ = 137664931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137664931) 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 3 ways as a sum of consecutive naturals, for example, 22944154 + ... + 22944159.

It is an arithmetic number, because the mean of its divisors is an integer number (45888314).

Almost surely, 2^137664939 is an apocalyptic number.

137664939 is a deficient number, since it is larger than the sum of its proper divisors (45888317).

137664939 is an equidigital number, since it uses as much as digits as its factorization.

137664939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45888316.

The product of its digits is 734832, while the sum is 48.

The square root of 137664939 is about 11733.0703142869. The cubic root of 137664939 is about 516.3463549587.

The spelling of 137664939 in words is "one hundred thirty-seven million, six hundred sixty-four thousand, nine hundred thirty-nine".