631321349 has 4 divisors (see below), whose sum is σ = 631503180. Its totient is φ = 631139520.

The previous prime is 631321261. The next prime is 631321373. The reversal of 631321349 is 943123136.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84088900 + 547232449 = 9170^2 + 23393^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631321349 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 (631323349) 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, 85604 + ... + 92685.

It is an arithmetic number, because the mean of its divisors is an integer number (157875795).

Almost surely, 2^631321349 is an apocalyptic number.

It is an amenable number.

631321349 is a deficient number, since it is larger than the sum of its proper divisors (181831).

631321349 is a wasteful number, since it uses less digits than its factorization.

631321349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181830.

The product of its digits is 11664, while the sum is 32.

The square root of 631321349 is about 25126.1089108521. The cubic root of 631321349 is about 857.8608041733.

The spelling of 631321349 in words is "six hundred thirty-one million, three hundred twenty-one thousand, three hundred forty-nine".