8899681 has 4 divisors (see below), whose sum is σ = 10171072. Its totient is φ = 7628292.

The previous prime is 8899663. The next prime is 8899691. The reversal of 8899681 is 1869988.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 8899681 - 2¹¹ = 8897633 is a prime.

It is a super-2 number, since 2×8899681² = 158408643803522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8899651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 635685 + ... + 635698.

It is an arithmetic number, because the mean of its divisors is an integer number (2542768).

Almost surely, 2^8899681 is an apocalyptic number.

It is an amenable number.

8899681 is a deficient number, since it is larger than the sum of its proper divisors (1271391).

8899681 is a wasteful number, since it uses less digits than its factorization.

8899681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271390.

The product of its digits is 248832, while the sum is 49.

The square root of 8899681 is about 2983.2333130347. The cubic root of 8899681 is about 207.2326338213.

The spelling of 8899681 in words is "eight million, eight hundred ninety-nine thousand, six hundred eighty-one".