31941993 has 8 divisors (see below), whose sum is σ = 43628256. Its totient is φ = 20775200.

The previous prime is 31941971. The next prime is 31942007. The reversal of 31941993 is 39914913.

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 31941993 - 2¹² = 31937897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31941193) 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, 129723 + ... + 129968.

It is an arithmetic number, because the mean of its divisors is an integer number (5453532).

Almost surely, 2^31941993 is an apocalyptic number.

It is an amenable number.

31941993 is a deficient number, since it is larger than the sum of its proper divisors (11686263).

31941993 is a wasteful number, since it uses less digits than its factorization.

31941993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259735.

The product of its digits is 26244, while the sum is 39.

The square root of 31941993 is about 5651.7247809850. The cubic root of 31941993 is about 317.2882602530.

The spelling of 31941993 in words is "thirty-one million, nine hundred forty-one thousand, nine hundred ninety-three".