137899791 has 12 divisors (see below), whose sum is σ = 199478760. Its totient is φ = 91799280.

The previous prime is 137899763. The next prime is 137899819. The reversal of 137899791 is 197998731.

It is an interprime number because it is at equal distance from previous prime (137899763) and next prime (137899819).

It is not a de Polignac number, because 137899791 - 2¹³ = 137891599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137899591) 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 11 ways as a sum of consecutive naturals, for example, 4425 + ... + 17186.

It is an arithmetic number, because the mean of its divisors is an integer number (16623230).

Almost surely, 2^137899791 is an apocalyptic number.

137899791 is a deficient number, since it is larger than the sum of its proper divisors (61578969).

137899791 is a wasteful number, since it uses less digits than its factorization.

137899791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22326 (or 22323 counting only the distinct ones).

The product of its digits is 857304, while the sum is 54.

The square root of 137899791 is about 11743.0741716128. The cubic root of 137899791 is about 516.6398116230.

The spelling of 137899791 in words is "one hundred thirty-seven million, eight hundred ninety-nine thousand, seven hundred ninety-one".