137308816 has 20 divisors (see below), whose sum is σ = 266711724. Its totient is φ = 68480000.

The previous prime is 137308807. The next prime is 137308819. The reversal of 137308816 is 618803731.

It can be written as a sum of positive squares in 2 ways, for example, as 94012416 + 43296400 = 9696^2 + 6580^2 .

It is not an unprimeable number, because it can be changed into a prime (137308819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4285 + ... + 17116.

Almost surely, 2^137308816 is an apocalyptic number.

137308816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

137308816 is a deficient number, since it is larger than the sum of its proper divisors (129402908).

137308816 is a wasteful number, since it uses less digits than its factorization.

137308816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21810 (or 21804 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 137308816 is about 11717.8844507018. The cubic root of 137308816 is about 515.9007280532.

The spelling of 137308816 in words is "one hundred thirty-seven million, three hundred eight thousand, eight hundred sixteen".