631707109 has 8 divisors (see below), whose sum is σ = 705161952. Its totient is φ = 560923440.

The previous prime is 631707077. The next prime is 631707113. The reversal of 631707109 is 901707136.

It is a happy number.

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

It is not a de Polignac number, because 631707109 - 2⁵ = 631707077 is a prime.

It is a super-2 number, since 2×631707109² = 798107743122275762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631707149) 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, 667294 + ... + 668239.

It is an arithmetic number, because the mean of its divisors is an integer number (88145244).

Almost surely, 2^631707109 is an apocalyptic number.

It is an amenable number.

631707109 is a deficient number, since it is larger than the sum of its proper divisors (73454843).

631707109 is a wasteful number, since it uses less digits than its factorization.

631707109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335587.

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 631707109 is about 25133.7842156727. The cubic root of 631707109 is about 858.0354965093.

The spelling of 631707109 in words is "six hundred thirty-one million, seven hundred seven thousand, one hundred nine".