881688621 has 16 divisors (see below), whose sum is σ = 1284433920. Its totient is φ = 533532720.

The previous prime is 881688617. The next prime is 881688623. The reversal of 881688621 is 126886188.

It is not a de Polignac number, because 881688621 - 2² = 881688617 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (881688623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1476 + ... + 42018.

It is an arithmetic number, because the mean of its divisors is an integer number (80277120).

Almost surely, 2^881688621 is an apocalyptic number.

It is an amenable number.

881688621 is a deficient number, since it is larger than the sum of its proper divisors (402745299).

881688621 is a wasteful number, since it uses less digits than its factorization.

881688621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41216.

The product of its digits is 294912, while the sum is 48.

The square root of 881688621 is about 29693.2420089151. The cubic root of 881688621 is about 958.8965261497.

The spelling of 881688621 in words is "eight hundred eighty-one million, six hundred eighty-eight thousand, six hundred twenty-one".