747881 has 16 divisors (see below), whose sum is σ = 861840. Its totient is φ = 645120.

The previous prime is 747871. The next prime is 747889. The reversal of 747881 is 188747.

It can be written as a sum of positive squares in 8 ways, for example, as 8281 + 739600 = 91^2 + 860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-747881 is a prime.

It is a super-2 number, since 2×747881² = 1118651980322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (747889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18221 + ... + 18261.

It is an arithmetic number, because the mean of its divisors is an integer number (53865).

2⁷⁴⁷⁸⁸¹ is an apocalyptic number.

It is an amenable number.

747881 is a deficient number, since it is larger than the sum of its proper divisors (113959).

747881 is a wasteful number, since it uses less digits than its factorization.

747881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124.

The product of its digits is 12544, while the sum is 35.

The square root of 747881 is about 864.8011332092. The cubic root of 747881 is about 90.7703827409.

The spelling of 747881 in words is "seven hundred forty-seven thousand, eight hundred eighty-one".