881691901 has 8 divisors (see below), whose sum is σ = 913025880. Its totient is φ = 850420032.

The previous prime is 881691851. The next prime is 881691917. The reversal of 881691901 is 109196188.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 106069401 + 775622500 = 10299^2 + 27850^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 881691901 - 2¹³ = 881683709 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 (881691931) 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 7 ways as a sum of consecutive naturals, for example, 14371 + ... + 44383.

It is an arithmetic number, because the mean of its divisors is an integer number (114128235).

Almost surely, 2^881691901 is an apocalyptic number.

It is an amenable number.

881691901 is a deficient number, since it is larger than the sum of its proper divisors (31333979).

881691901 is a wasteful number, since it uses less digits than its factorization.

881691901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31055.

The product of its (nonzero) digits is 31104, while the sum is 43.

The square root of 881691901 is about 29693.2972402864. The cubic root of 881691901 is about 958.8977152228.

The spelling of 881691901 in words is "eight hundred eighty-one million, six hundred ninety-one thousand, nine hundred one".