8701981 has 8 divisors (see below), whose sum is σ = 9558720. Its totient is φ = 7885152.

The previous prime is 8701961. The next prime is 8701991. The reversal of 8701981 is 1891078.

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

It is not a de Polignac number, because 8701981 - 2⁵ = 8701949 is a prime.

It is a super-2 number, since 2×8701981² = 151448946648722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8701921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9520 + ... + 10393.

It is an arithmetic number, because the mean of its divisors is an integer number (1194840).

Almost surely, 2^8701981 is an apocalyptic number.

It is an amenable number.

8701981 is a deficient number, since it is larger than the sum of its proper divisors (856739).

8701981 is a wasteful number, since it uses less digits than its factorization.

8701981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19955.

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 8701981 is about 2949.9120325867. The cubic root of 8701981 is about 205.6866209445.

The spelling of 8701981 in words is "eight million, seven hundred one thousand, nine hundred eighty-one".