139879537 has 8 divisors (see below), whose sum is σ = 166813056. Its totient is φ = 114683712.

The previous prime is 139879511. The next prime is 139879541. The reversal of 139879537 is 735978931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139879537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139879507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434248 + ... + 434569.

It is an arithmetic number, because the mean of its divisors is an integer number (20851632).

Almost surely, 2^139879537 is an apocalyptic number.

It is an amenable number.

139879537 is a deficient number, since it is larger than the sum of its proper divisors (26933519).

139879537 is an equidigital number, since it uses as much as digits as its factorization.

139879537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868847.

The product of its digits is 1428840, while the sum is 52.

The square root of 139879537 is about 11827.0679798503. The cubic root of 139879537 is about 519.1004380643.

The spelling of 139879537 in words is "one hundred thirty-nine million, eight hundred seventy-nine thousand, five hundred thirty-seven".