631746993 has 8 divisors (see below), whose sum is σ = 845021728. Its totient is φ = 419818464.

The previous prime is 631746967. The next prime is 631747001. The reversal of 631746993 is 399647136.

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

It is not a de Polignac number, because 631746993 - 2⁵ = 631746961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631746293) 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, 335455 + ... + 337332.

It is an arithmetic number, because the mean of its divisors is an integer number (105627716).

Almost surely, 2^631746993 is an apocalyptic number.

It is an amenable number.

631746993 is a deficient number, since it is larger than the sum of its proper divisors (213274735).

631746993 is a wasteful number, since it uses less digits than its factorization.

631746993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673103.

The product of its digits is 734832, while the sum is 48.

The square root of 631746993 is about 25134.5776371914. The cubic root of 631746993 is about 858.0535540167.

The spelling of 631746993 in words is "six hundred thirty-one million, seven hundred forty-six thousand, nine hundred ninety-three".