631086247 has 4 divisors (see below), whose sum is σ = 688457736. Its totient is φ = 573714760.

The previous prime is 631086221. The next prime is 631086277. The reversal of 631086247 is 742680136.

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

It is a cyclic number.

It is not a de Polignac number, because 631086247 - 2¹⁹ = 630561959 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 (631086217) 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 in 3 ways as a sum of consecutive naturals, for example, 28685728 + ... + 28685749.

It is an arithmetic number, because the mean of its divisors is an integer number (172114434).

Almost surely, 2^631086247 is an apocalyptic number.

631086247 is a deficient number, since it is larger than the sum of its proper divisors (57371489).

631086247 is a wasteful number, since it uses less digits than its factorization.

631086247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57371488.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 631086247 is about 25121.4300349323. The cubic root of 631086247 is about 857.7543027685.

The spelling of 631086247 in words is "six hundred thirty-one million, eighty-six thousand, two hundred forty-seven".