137689679 has 4 divisors (see below), whose sum is σ = 139026576. Its totient is φ = 136352784.

The previous prime is 137689667. The next prime is 137689697. The reversal of 137689679 is 976986731.

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 137689679 - 2⁸ = 137689423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137689609) 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, 668294 + ... + 668499.

It is an arithmetic number, because the mean of its divisors is an integer number (34756644).

Almost surely, 2^137689679 is an apocalyptic number.

137689679 is a deficient number, since it is larger than the sum of its proper divisors (1336897).

137689679 is a wasteful number, since it uses less digits than its factorization.

137689679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336896.

The product of its digits is 3429216, while the sum is 56.

The square root of 137689679 is about 11734.1245519212. The cubic root of 137689679 is about 516.3772842661.

The spelling of 137689679 in words is "one hundred thirty-seven million, six hundred eighty-nine thousand, six hundred seventy-nine".