80901999 has 12 divisors (see below), whose sum is σ = 116940096. Its totient is φ = 53896992.

The previous prime is 80901983. The next prime is 80902001. The reversal of 80901999 is 99910908.

It is not a de Polignac number, because 80901999 - 2⁴ = 80901983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80901949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17827 + ... + 21899.

It is an arithmetic number, because the mean of its divisors is an integer number (9745008).

Almost surely, 2^80901999 is an apocalyptic number.

80901999 is a deficient number, since it is larger than the sum of its proper divisors (36038097).

80901999 is a wasteful number, since it uses less digits than its factorization.

80901999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6286 (or 6283 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 45.

The square root of 80901999 is about 8994.5538521930. The cubic root of 80901999 is about 432.5003044982.

The spelling of 80901999 in words is "eighty million, nine hundred one thousand, nine hundred ninety-nine".