631141986 has 16 divisors (see below), whose sum is σ = 1262592000. Its totient is φ = 210329328.

The previous prime is 631141963. The next prime is 631141999. The reversal of 631141986 is 689141136.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20440 + ... + 40988.

It is an arithmetic number, because the mean of its divisors is an integer number (78912000).

Almost surely, 2^631141986 is an apocalyptic number.

631141986 is an abundant number, since it is smaller than the sum of its proper divisors (631450014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631141986 is a wasteful number, since it uses less digits than its factorization.

631141986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25673.

The product of its digits is 31104, while the sum is 39.

The square root of 631141986 is about 25122.5394018996. The cubic root of 631141986 is about 857.7795549744.

The spelling of 631141986 in words is "six hundred thirty-one million, one hundred forty-one thousand, nine hundred eighty-six".