137899208 has 8 divisors (see below), whose sum is σ = 258561030. Its totient is φ = 68949600.

The previous prime is 137899183. The next prime is 137899213. The reversal of 137899208 is 802998731.

It can be written as a sum of positive squares in only one way, i.e., 90592324 + 47306884 = 9518^2 + 6878^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8618693 + ... + 8618708.

Almost surely, 2^137899208 is an apocalyptic number.

It is an amenable number.

137899208 is a deficient number, since it is larger than the sum of its proper divisors (120661822).

137899208 is a wasteful number, since it uses less digits than its factorization.

137899208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17237407 (or 17237403 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 137899208 is about 11743.0493484444. The cubic root of 137899208 is about 516.6390835546.

The spelling of 137899208 in words is "one hundred thirty-seven million, eight hundred ninety-nine thousand, two hundred eight".