31429963 has 2 divisors, whose sum is σ = 31429964. Its totient is φ = 31429962.

The previous prime is 31429921. The next prime is 31429973. The reversal of 31429963 is 36992413.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31429963 is a prime.

It is not a weakly prime, because it can be changed into another prime (31429973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15714981 + 15714982.

It is an arithmetic number, because the mean of its divisors is an integer number (15714982).

Almost surely, 2^31429963 is an apocalyptic number.

31429963 is a deficient number, since it is larger than the sum of its proper divisors (1).

31429963 is an equidigital number, since it uses as much as digits as its factorization.

31429963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 37.

The square root of 31429963 is about 5606.2432162724. The cubic root of 31429963 is about 315.5837432987.

The spelling of 31429963 in words is "thirty-one million, four hundred twenty-nine thousand, nine hundred sixty-three".