137249487 has 24 divisors (see below), whose sum is σ = 208286208. Its totient is φ = 86922000.

The previous prime is 137249473. The next prime is 137249513. The reversal of 137249487 is 784942731.

137249487 is a `hidden beast` number, since 13 + 72 + 494 + 87 = 666.

It is not a de Polignac number, because 137249487 - 2¹² = 137245391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137249467) 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 23 ways as a sum of consecutive naturals, for example, 29062 + ... + 33452.

It is an arithmetic number, because the mean of its divisors is an integer number (8678592).

Almost surely, 2^137249487 is an apocalyptic number.

137249487 is a deficient number, since it is larger than the sum of its proper divisors (71036721).

137249487 is a wasteful number, since it uses less digits than its factorization.

137249487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4571 (or 4568 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 137249487 is about 11715.3526195331. The cubic root of 137249487 is about 515.8264131266.

The spelling of 137249487 in words is "one hundred thirty-seven million, two hundred forty-nine thousand, four hundred eighty-seven".