631816349 has 4 divisors (see below), whose sum is σ = 635124480. Its totient is φ = 628508220.

The previous prime is 631816331. The next prime is 631816391. The reversal of 631816349 is 943618136.

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 631816349 - 2¹² = 631812253 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 (631816399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1653779 + ... + 1654160.

It is an arithmetic number, because the mean of its divisors is an integer number (158781120).

Almost surely, 2^631816349 is an apocalyptic number.

It is an amenable number.

631816349 is a deficient number, since it is larger than the sum of its proper divisors (3308131).

631816349 is a wasteful number, since it uses less digits than its factorization.

631816349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3308130.

The product of its digits is 93312, while the sum is 41.

The square root of 631816349 is about 25135.9572922934. The cubic root of 631816349 is about 858.0849531820.

The spelling of 631816349 in words is "six hundred thirty-one million, eight hundred sixteen thousand, three hundred forty-nine".