631538494 has 8 divisors (see below), whose sum is σ = 948992040. Its totient is φ = 315207816.

The previous prime is 631538471. The next prime is 631538507. The reversal of 631538494 is 494835136.

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

It is a self number, because there is not a number n which added to its sum of digits gives 631538494.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279309 + ... + 281560.

It is an arithmetic number, because the mean of its divisors is an integer number (118624005).

Almost surely, 2^631538494 is an apocalyptic number.

631538494 is a deficient number, since it is larger than the sum of its proper divisors (317453546).

631538494 is a wasteful number, since it uses less digits than its factorization.

631538494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561434.

The product of its digits is 311040, while the sum is 43.

The square root of 631538494 is about 25130.4296421689. The cubic root of 631538494 is about 857.9591475560.

The spelling of 631538494 in words is "six hundred thirty-one million, five hundred thirty-eight thousand, four hundred ninety-four".