8978000681 has 4 divisors (see below), whose sum is σ = 9668616132. Its totient is φ = 8287385232.

The previous prime is 8978000663. The next prime is 8978000683. The reversal of 8978000681 is 1860008798.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4523773081 + 4454227600 = 67259^2 + 66740^2 .

It is a cyclic number.

It is not a de Polignac number, because 8978000681 - 2²² = 8973806377 is a prime.

It is a super-2 number, since 2×8978000681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8978000683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345307706 + ... + 345307731.

It is an arithmetic number, because the mean of its divisors is an integer number (2417154033).

Almost surely, 2^8978000681 is an apocalyptic number.

It is an amenable number.

8978000681 is a deficient number, since it is larger than the sum of its proper divisors (690615451).

8978000681 is a wasteful number, since it uses less digits than its factorization.

8978000681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690615450.

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 8978000681 is about 94752.3122725773. The cubic root of 8978000681 is about 2078.3876095924.

The spelling of 8978000681 in words is "eight billion, nine hundred seventy-eight million, six hundred eighty-one", and thus it is an aban number.