31319663 has 2 divisors, whose sum is σ = 31319664. Its totient is φ = 31319662.

The previous prime is 31319653. The next prime is 31319669. The reversal of 31319663 is 36691313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31319663 - 2⁴ = 31319647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31319669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15659831 + 15659832.

It is an arithmetic number, because the mean of its divisors is an integer number (15659832).

Almost surely, 2^31319663 is an apocalyptic number.

31319663 is a deficient number, since it is larger than the sum of its proper divisors (1).

31319663 is an equidigital number, since it uses as much as digits as its factorization.

31319663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 32.

The square root of 31319663 is about 5596.3973232786. The cubic root of 31319663 is about 315.2141417841.

The spelling of 31319663 in words is "thirty-one million, three hundred nineteen thousand, six hundred sixty-three".