31415663 has 2 divisors, whose sum is σ = 31415664. Its totient is φ = 31415662.

The previous prime is 31415641. The next prime is 31415669. The reversal of 31415663 is 36651413.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (36651413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31415663 - 2⁸ = 31415407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31415669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15707831 + 15707832.

It is an arithmetic number, because the mean of its divisors is an integer number (15707832).

Almost surely, 2^31415663 is an apocalyptic number.

31415663 is a deficient number, since it is larger than the sum of its proper divisors (1).

31415663 is an equidigital number, since it uses as much as digits as its factorization.

31415663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 29.

The square root of 31415663 is about 5604.9677073111. The cubic root of 31415663 is about 315.5358746230.

The spelling of 31415663 in words is "thirty-one million, four hundred fifteen thousand, six hundred sixty-three".