31936444093 has 2 divisors, whose sum is σ = 31936444094. Its totient is φ = 31936444092.

The previous prime is 31936444091. The next prime is 31936444151. The reversal of 31936444093 is 39044463913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24795856089 + 7140588004 = 157467^2 + 84502^2 .

It is a cyclic number.

It is not a de Polignac number, because 31936444093 - 2¹ = 31936444091 is a prime.

It is a super-2 number, since 2×31936444093² (a number of 22 digits) contains 22 as substring.

Together with 31936444091, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31936444091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15968222046 + 15968222047.

It is an arithmetic number, because the mean of its divisors is an integer number (15968222047).

Almost surely, 2^31936444093 is an apocalyptic number.

It is an amenable number.

31936444093 is a deficient number, since it is larger than the sum of its proper divisors (1).

31936444093 is an equidigital number, since it uses as much as digits as its factorization.

31936444093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 46.

The spelling of 31936444093 in words is "thirty-one billion, nine hundred thirty-six million, four hundred forty-four thousand, ninety-three".