80868899 has 4 divisors (see below), whose sum is σ = 80888880. Its totient is φ = 80848920.

The previous prime is 80868869. The next prime is 80868911. The reversal of 80868899 is 99886808.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80868899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80868829) 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, 1532 + ... + 12809.

It is an arithmetic number, because the mean of its divisors is an integer number (20222220).

Almost surely, 2^80868899 is an apocalyptic number.

80868899 is a deficient number, since it is larger than the sum of its proper divisors (19981).

80868899 is a wasteful number, since it uses less digits than its factorization.

80868899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19980.

The product of its (nonzero) digits is 1990656, while the sum is 56.

The square root of 80868899 is about 8992.7136616263. The cubic root of 80868899 is about 432.4413124953.

The spelling of 80868899 in words is "eighty million, eight hundred sixty-eight thousand, eight hundred ninety-nine".