31119979 has 8 divisors (see below), whose sum is σ = 35946288. Its totient is φ = 26626560.

The previous prime is 31119971. The next prime is 31119983. The reversal of 31119979 is 97991113.

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

It is a cyclic number.

It is not a de Polignac number, because 31119979 - 2³ = 31119971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31119971) 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, 83022 + ... + 83395.

It is an arithmetic number, because the mean of its divisors is an integer number (4493286).

Almost surely, 2^31119979 is an apocalyptic number.

31119979 is a deficient number, since it is larger than the sum of its proper divisors (4826309).

31119979 is a wasteful number, since it uses less digits than its factorization.

31119979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166445.

The product of its digits is 15309, while the sum is 40.

The square root of 31119979 is about 5578.5283901760. The cubic root of 31119979 is about 314.5428120295.

The spelling of 31119979 in words is "thirty-one million, one hundred nineteen thousand, nine hundred seventy-nine".