8697078981 has 12 divisors (see below), whose sum is σ = 13223629120. Its totient is φ = 5492891880.

The previous prime is 8697078961. The next prime is 8697078989. The reversal of 8697078981 is 1898707968.

It is not a de Polignac number, because 8697078981 - 2⁷ = 8697078853 is a prime.

It is a super-2 number, since 2×8697078981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8697078989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25429885 + ... + 25430226.

Almost surely, 2^8697078981 is an apocalyptic number.

It is an amenable number.

8697078981 is a deficient number, since it is larger than the sum of its proper divisors (4526550139).

8697078981 is a wasteful number, since it uses less digits than its factorization.

8697078981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50860136 (or 50860133 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 63.

The square root of 8697078981 is about 93258.1309109292. The cubic root of 8697078981 is about 2056.4799107726.

The spelling of 8697078981 in words is "eight billion, six hundred ninety-seven million, seventy-eight thousand, nine hundred eighty-one".