31968973 has 8 divisors (see below), whose sum is σ = 32628960. Its totient is φ = 31313040.

The previous prime is 31968953. The next prime is 31968997. The reversal of 31968973 is 37986913.

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-31968973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31968913) 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, 18711 + ... + 20347.

It is an arithmetic number, because the mean of its divisors is an integer number (4078620).

Almost surely, 2^31968973 is an apocalyptic number.

It is an amenable number.

31968973 is a deficient number, since it is larger than the sum of its proper divisors (659987).

31968973 is a wasteful number, since it uses less digits than its factorization.

31968973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027.

The product of its digits is 244944, while the sum is 46.

The square root of 31968973 is about 5654.1111591478. Note that the first 4 decimals coincide. The cubic root of 31968973 is about 317.3775682702.

The spelling of 31968973 in words is "thirty-one million, nine hundred sixty-eight thousand, nine hundred seventy-three".