80899893 has 6 divisors (see below), whose sum is σ = 116855414. Its totient is φ = 53933256.

The previous prime is 80899877. The next prime is 80899913. The reversal of 80899893 is 39899808.

It can be written as a sum of positive squares in only one way, i.e., 80407089 + 492804 = 8967^2 + 702^2 .

It is not a de Polignac number, because 80899893 - 2⁴ = 80899877 is a prime.

It is a super-2 number, since 2×80899893² = 13089585374822898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80899873) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4494430 + ... + 4494447.

Almost surely, 2^80899893 is an apocalyptic number.

It is an amenable number.

80899893 is a deficient number, since it is larger than the sum of its proper divisors (35955521).

80899893 is a wasteful number, since it uses less digits than its factorization.

80899893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8988883 (or 8988880 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 80899893 is about 8994.4367805883. The cubic root of 80899893 is about 432.4965515891.

The spelling of 80899893 in words is "eighty million, eight hundred ninety-nine thousand, eight hundred ninety-three".