31421412973 has 2 divisors, whose sum is σ = 31421412974. Its totient is φ = 31421412972.

The previous prime is 31421412929. The next prime is 31421413043. The reversal of 31421412973 is 37921412413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17192978884 + 14228434089 = 131122^2 + 119283^2 .

It is a cyclic number.

It is not a de Polignac number, because 31421412973 - 2³³ = 22831478381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31421512973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15710706486 + 15710706487.

It is an arithmetic number, because the mean of its divisors is an integer number (15710706487).

Almost surely, 2^31421412973 is an apocalyptic number.

It is an amenable number.

31421412973 is a deficient number, since it is larger than the sum of its proper divisors (1).

31421412973 is an equidigital number, since it uses as much as digits as its factorization.

31421412973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The spelling of 31421412973 in words is "thirty-one billion, four hundred twenty-one million, four hundred twelve thousand, nine hundred seventy-three".