631610993 has 8 divisors (see below), whose sum is σ = 688392768. Its totient is φ = 576000144.

The previous prime is 631610983. The next prime is 631610999. The reversal of 631610993 is 399016136.

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

It is a cyclic number.

It is not a de Polignac number, because 631610993 - 2²⁰ = 630562417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631610999) 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, 291605 + ... + 293762.

It is an arithmetic number, because the mean of its divisors is an integer number (86049096).

Almost surely, 2^631610993 is an apocalyptic number.

It is an amenable number.

631610993 is a deficient number, since it is larger than the sum of its proper divisors (56781775).

631610993 is a wasteful number, since it uses less digits than its factorization.

631610993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585463.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 631610993 is about 25131.8720552210. The cubic root of 631610993 is about 857.9919768033.

The spelling of 631610993 in words is "six hundred thirty-one million, six hundred ten thousand, nine hundred ninety-three".