31401903373 has 2 divisors, whose sum is σ = 31401903374. Its totient is φ = 31401903372.

The previous prime is 31401903371. The next prime is 31401903391. The reversal of 31401903373 is 37330910413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16301671684 + 15100231689 = 127678^2 + 122883^2 .

It is an emirp because it is prime and its reverse (37330910413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31401903373 - 2¹ = 31401903371 is a prime.

Together with 31401903371, 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 (31401903371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15700951686 + 15700951687.

It is an arithmetic number, because the mean of its divisors is an integer number (15700951687).

Almost surely, 2^31401903373 is an apocalyptic number.

It is an amenable number.

31401903373 is a deficient number, since it is larger than the sum of its proper divisors (1).

31401903373 is an equidigital number, since it uses as much as digits as its factorization.

31401903373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 34.

The spelling of 31401903373 in words is "thirty-one billion, four hundred one million, nine hundred three thousand, three hundred seventy-three".