137736691 has 4 divisors (see below), whose sum is σ = 137862000. Its totient is φ = 137611384.

The previous prime is 137736679. The next prime is 137736701. The reversal of 137736691 is 196637731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 137736691 - 2⁵ = 137736659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137736661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60991 + ... + 63208.

It is an arithmetic number, because the mean of its divisors is an integer number (34465500).

Almost surely, 2^137736691 is an apocalyptic number.

137736691 is a deficient number, since it is larger than the sum of its proper divisors (125309).

137736691 is a wasteful number, since it uses less digits than its factorization.

137736691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125308.

The product of its digits is 142884, while the sum is 43.

The square root of 137736691 is about 11736.1275981475. The cubic root of 137736691 is about 516.4360472436.

The spelling of 137736691 in words is "one hundred thirty-seven million, seven hundred thirty-six thousand, six hundred ninety-one".