876081981 has 8 divisors (see below), whose sum is σ = 1180152064. Its totient is φ = 578033280.

The previous prime is 876081977. The next prime is 876081989. The reversal of 876081981 is 189180678.

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

It is not a de Polignac number, because 876081981 - 2² = 876081977 is a prime.

It is a super-2 number, since 2×876081981² = 1535039274865768722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 876081981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (876081989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1505005 + ... + 1505586.

It is an arithmetic number, because the mean of its divisors is an integer number (147519008).

Almost surely, 2^876081981 is an apocalyptic number.

It is an amenable number.

876081981 is a deficient number, since it is larger than the sum of its proper divisors (304070083).

876081981 is a wasteful number, since it uses less digits than its factorization.

876081981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3010691.

The product of its (nonzero) digits is 193536, while the sum is 48.

The square root of 876081981 is about 29598.6820821468. The cubic root of 876081981 is about 956.8596680836.

The spelling of 876081981 in words is "eight hundred seventy-six million, eighty-one thousand, nine hundred eighty-one".