631613306 has 4 divisors (see below), whose sum is σ = 947419962. Its totient is φ = 315806652.

The previous prime is 631613263. The next prime is 631613309. The reversal of 631613306 is 603316136.

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

It can be written as a sum of positive squares in only one way, i.e., 569061025 + 62552281 = 23855^2 + 7909^2 .

It is not an unprimeable number, because it can be changed into a prime (631613309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157903325 + ... + 157903328.

Almost surely, 2^631613306 is an apocalyptic number.

631613306 is a deficient number, since it is larger than the sum of its proper divisors (315806656).

631613306 is a wasteful number, since it uses less digits than its factorization.

631613306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315806655.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 631613306 is about 25131.9180724433. The cubic root of 631613306 is about 857.9930241426.

The spelling of 631613306 in words is "six hundred thirty-one million, six hundred thirteen thousand, three hundred six".