31973637923 has 2 divisors, whose sum is σ = 31973637924. Its totient is φ = 31973637922.

The previous prime is 31973637823. The next prime is 31973637929. The reversal of 31973637923 is 32973637913.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31973637923 - 2¹⁶ = 31973572387 is a prime.

It is a super-2 number, since 2×31973637923² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31973637929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15986818961 + 15986818962.

It is an arithmetic number, because the mean of its divisors is an integer number (15986818962).

Almost surely, 2^31973637923 is an apocalyptic number.

31973637923 is a deficient number, since it is larger than the sum of its proper divisors (1).

31973637923 is an equidigital number, since it uses as much as digits as its factorization.

31973637923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3857868, while the sum is 53.

The spelling of 31973637923 in words is "thirty-one billion, nine hundred seventy-three million, six hundred thirty-seven thousand, nine hundred twenty-three".