31407963 has 4 divisors (see below), whose sum is σ = 41877288. Its totient is φ = 20938640.

The previous prime is 31407953. The next prime is 31407967. The reversal of 31407963 is 36970413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36970413 = 3 ⋅12323471.

It is a cyclic number.

It is not a de Polignac number, because 31407963 - 2⁹ = 31407451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31407967) 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 in 3 ways as a sum of consecutive naturals, for example, 5234658 + ... + 5234663.

It is an arithmetic number, because the mean of its divisors is an integer number (10469322).

Almost surely, 2^31407963 is an apocalyptic number.

31407963 is a deficient number, since it is larger than the sum of its proper divisors (10469325).

31407963 is a wasteful number, since it uses less digits than its factorization.

31407963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10469324.

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 31407963 is about 5604.2807745508. The cubic root of 31407963 is about 315.5100931653.

The spelling of 31407963 in words is "thirty-one million, four hundred seven thousand, nine hundred sixty-three".