31097973 has 8 divisors (see below), whose sum is σ = 42346368. Its totient is φ = 20290784.

The previous prime is 31097953. The next prime is 31097977. The reversal of 31097973 is 37979013.

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 31097973 - 2¹² = 31093877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31097977) 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 7 ways as a sum of consecutive naturals, for example, 110136 + ... + 110417.

It is an arithmetic number, because the mean of its divisors is an integer number (5293296).

Almost surely, 2^31097973 is an apocalyptic number.

It is an amenable number.

31097973 is a deficient number, since it is larger than the sum of its proper divisors (11248395).

31097973 is a wasteful number, since it uses less digits than its factorization.

31097973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220603.

The product of its (nonzero) digits is 35721, while the sum is 39.

The square root of 31097973 is about 5576.5556573928. Note that the first 3 decimals coincide. The cubic root of 31097973 is about 314.4686532249.

The spelling of 31097973 in words is "thirty-one million, ninety-seven thousand, nine hundred seventy-three".