631789101 has 12 divisors (see below), whose sum is σ = 913231228. Its totient is φ = 420894144.

The previous prime is 631789069. The next prime is 631789117. The reversal of 631789101 is 101987136.

631789101 is a `hidden beast` number, since 631 + 7 + 8 + 9 + 10 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 437855625 + 193933476 = 20925^2 + 13926^2 .

It is not a de Polignac number, because 631789101 - 2⁵ = 631789069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631789201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11080 + ... + 37233.

Almost surely, 2^631789101 is an apocalyptic number.

It is an amenable number.

631789101 is a deficient number, since it is larger than the sum of its proper divisors (281442127).

631789101 is a wasteful number, since it uses less digits than its factorization.

631789101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49772 (or 49769 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 631789101 is about 25135.4152740710. The cubic root of 631789101 is about 858.0726176170.

The spelling of 631789101 in words is "six hundred thirty-one million, seven hundred eighty-nine thousand, one hundred one".