631830993 has 16 divisors (see below), whose sum is σ = 895841856. Its totient is φ = 394734080.

The previous prime is 631830989. The next prime is 631831007. The reversal of 631830993 is 399038136.

It is a cyclic number.

It is not a de Polignac number, because 631830993 - 2² = 631830989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631830593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14703 + ... + 38468.

It is an arithmetic number, because the mean of its divisors is an integer number (55990116).

Almost surely, 2^631830993 is an apocalyptic number.

It is an amenable number.

631830993 is a deficient number, since it is larger than the sum of its proper divisors (264010863).

631830993 is a wasteful number, since it uses less digits than its factorization.

631830993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53424.

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 631830993 is about 25136.2485864538. The cubic root of 631830993 is about 858.0915825867.

The spelling of 631830993 in words is "six hundred thirty-one million, eight hundred thirty thousand, nine hundred ninety-three".