137387816 has 8 divisors (see below), whose sum is σ = 257602170. Its totient is φ = 68693904.

The previous prime is 137387791. The next prime is 137387821. The reversal of 137387816 is 618783731.

137387816 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 78251716 + 59136100 = 8846^2 + 7690^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 8586731 + ... + 8586746.

Almost surely, 2^137387816 is an apocalyptic number.

It is an amenable number.

137387816 is a deficient number, since it is larger than the sum of its proper divisors (120214354).

137387816 is a wasteful number, since it uses less digits than its factorization.

137387816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17173483 (or 17173479 counting only the distinct ones).

The product of its digits is 169344, while the sum is 44.

The square root of 137387816 is about 11721.2548816242. The cubic root of 137387816 is about 515.9996494599. Note that the first 3 decimals are identical.

The spelling of 137387816 in words is "one hundred thirty-seven million, three hundred eighty-seven thousand, eight hundred sixteen".