9139979 has 4 divisors (see below), whose sum is σ = 9169680. Its totient is φ = 9110280.

The previous prime is 9139973. The next prime is 9139981. The reversal of 9139979 is 9799319.

It is a happy number.

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 9139979 - 2⁸ = 9139723 is a prime.

It is a super-2 number, since 2×9139979² = 167078432240882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9139973) 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 3 ways as a sum of consecutive naturals, for example, 14384 + ... + 15005.

It is an arithmetic number, because the mean of its divisors is an integer number (2292420).

Almost surely, 2^9139979 is an apocalyptic number.

9139979 is a deficient number, since it is larger than the sum of its proper divisors (29701).

9139979 is a wasteful number, since it uses less digits than its factorization.

9139979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29700.

The product of its digits is 137781, while the sum is 47.

The square root of 9139979 is about 3023.2398184729. The cubic root of 9139979 is about 209.0812394509.

The spelling of 9139979 in words is "nine million, one hundred thirty-nine thousand, nine hundred seventy-nine".