31997463 has 8 divisors (see below), whose sum is σ = 44908800. Its totient is φ = 20208888.

The previous prime is 31997431. The next prime is 31997473. The reversal of 31997463 is 36479913.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31997463 - 2⁵ = 31997431 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31997423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280623 + ... + 280736.

It is an arithmetic number, because the mean of its divisors is an integer number (5613600).

Almost surely, 2^31997463 is an apocalyptic number.

31997463 is a deficient number, since it is larger than the sum of its proper divisors (12911337).

31997463 is a wasteful number, since it uses less digits than its factorization.

31997463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561381.

The product of its digits is 122472, while the sum is 42.

The square root of 31997463 is about 5656.6300038097. The cubic root of 31997463 is about 317.4718200959.

The spelling of 31997463 in words is "thirty-one million, nine hundred ninety-seven thousand, four hundred sixty-three".