31979641 has 8 divisors (see below), whose sum is σ = 33759200. Its totient is φ = 30209760.

The previous prime is 31979627. The next prime is 31979687. The reversal of 31979641 is 14697913.

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 31979641 - 2⁷ = 31979513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31979594 and 31979603.

It is not an unprimeable number, because it can be changed into a prime (31979341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4981 + ... + 9421.

It is an arithmetic number, because the mean of its divisors is an integer number (4219900).

Almost surely, 2^31979641 is an apocalyptic number.

It is an amenable number.

31979641 is a deficient number, since it is larger than the sum of its proper divisors (1779559).

31979641 is a wasteful number, since it uses less digits than its factorization.

31979641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4839.

The product of its digits is 40824, while the sum is 40.

The square root of 31979641 is about 5655.0544648129. The cubic root of 31979641 is about 317.4128671557.

The spelling of 31979641 in words is "thirty-one million, nine hundred seventy-nine thousand, six hundred forty-one".