631949617 has 8 divisors (see below), whose sum is σ = 682343424. Its totient is φ = 581810448.

The previous prime is 631949609. The next prime is 631949623. The reversal of 631949617 is 716949136.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 631949617 - 2³ = 631949609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631941617) 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, 58483 + ... + 68440.

It is an arithmetic number, because the mean of its divisors is an integer number (85292928).

Almost surely, 2^631949617 is an apocalyptic number.

It is an amenable number.

631949617 is a deficient number, since it is larger than the sum of its proper divisors (50393807).

631949617 is a wasteful number, since it uses less digits than its factorization.

631949617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127319.

The product of its digits is 244944, while the sum is 46.

The square root of 631949617 is about 25138.6080959149. The cubic root of 631949617 is about 858.1452804307.

The spelling of 631949617 in words is "six hundred thirty-one million, nine hundred forty-nine thousand, six hundred seventeen".