31440963 has 4 divisors (see below), whose sum is σ = 41921288. Its totient is φ = 20960640.

The previous prime is 31440961. The next prime is 31441043. The reversal of 31440963 is 36904413.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31440963 - 2¹ = 31440961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31440963.

It is not an unprimeable number, because it can be changed into a prime (31440961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5240158 + ... + 5240163.

It is an arithmetic number, because the mean of its divisors is an integer number (10480322).

Almost surely, 2^31440963 is an apocalyptic number.

31440963 is a deficient number, since it is larger than the sum of its proper divisors (10480325).

31440963 is a wasteful number, since it uses less digits than its factorization.

31440963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10480324.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 31440963 is about 5607.2241795741. The cubic root of 31440963 is about 315.6205554777.

The spelling of 31440963 in words is "thirty-one million, four hundred forty thousand, nine hundred sixty-three".