747871631 has 16 divisors (see below), whose sum is σ = 814399488. Its totient is φ = 682668000.

The previous prime is 747871589. The next prime is 747871637. The reversal of 747871631 is 136178747.

It is a cyclic number.

It is not a de Polignac number, because 747871631 - 2¹⁸ = 747609487 is a prime.

It is a super-2 number, since 2×747871631² = 1118623952909200322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747871637) 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 15 ways as a sum of consecutive naturals, for example, 711056 + ... + 712106.

It is an arithmetic number, because the mean of its divisors is an integer number (50899968).

Almost surely, 2^747871631 is an apocalyptic number.

747871631 is a deficient number, since it is larger than the sum of its proper divisors (66527857).

747871631 is a wasteful number, since it uses less digits than its factorization.

747871631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622.

The product of its digits is 197568, while the sum is 44.

The square root of 747871631 is about 27347.2417439127. The cubic root of 747871631 is about 907.7000370048.

It can be divided in two parts, 7478716 and 31, that added together give a palindrome (7478747).

The spelling of 747871631 in words is "seven hundred forty-seven million, eight hundred seventy-one thousand, six hundred thirty-one".