80999858 has 8 divisors (see below), whose sum is σ = 121754880. Its totient is φ = 40414900.

The previous prime is 80999857. The next prime is 80999881. The reversal of 80999858 is 85899908.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (80999857) 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, 41318 + ... + 43233.

It is an arithmetic number, because the mean of its divisors is an integer number (15219360).

Almost surely, 2^80999858 is an apocalyptic number.

80999858 is a deficient number, since it is larger than the sum of its proper divisors (40755022).

80999858 is a wasteful number, since it uses less digits than its factorization.

80999858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85032.

The product of its (nonzero) digits is 1866240, while the sum is 56.

The square root of 80999858 is about 8999.9921111077. The cubic root of 80999858 is about 432.6746182533.

The spelling of 80999858 in words is "eighty million, nine hundred ninety-nine thousand, eight hundred fifty-eight".