631336109 has 4 divisors (see below), whose sum is σ = 640759104. Its totient is φ = 621913116.

The previous prime is 631336099. The next prime is 631336117. The reversal of 631336109 is 901633136.

631336109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 631336109 - 2²⁰ = 630287533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631336129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4711397 + ... + 4711530.

It is an arithmetic number, because the mean of its divisors is an integer number (160189776).

Almost surely, 2^631336109 is an apocalyptic number.

It is an amenable number.

631336109 is a deficient number, since it is larger than the sum of its proper divisors (9422995).

631336109 is an equidigital number, since it uses as much as digits as its factorization.

631336109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9422994.

The product of its (nonzero) digits is 8748, while the sum is 32.

The square root of 631336109 is about 25126.4026275151. The cubic root of 631336109 is about 857.8674895836.

The spelling of 631336109 in words is "six hundred thirty-one million, three hundred thirty-six thousand, one hundred nine".