80997189 has 16 divisors (see below), whose sum is σ = 132918912. Its totient is φ = 42723648.

The previous prime is 80997187. The next prime is 80997211. The reversal of 80997189 is 98179908.

It is not a de Polignac number, because 80997189 - 2¹ = 80997187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80997187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148074 + ... + 148619.

It is an arithmetic number, because the mean of its divisors is an integer number (8307432).

Almost surely, 2^80997189 is an apocalyptic number.

It is an amenable number.

80997189 is a deficient number, since it is larger than the sum of its proper divisors (51921723).

80997189 is a wasteful number, since it uses less digits than its factorization.

80997189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296716.

The product of its (nonzero) digits is 326592, while the sum is 51.

The square root of 80997189 is about 8999.8438319784. The cubic root of 80997189 is about 432.6698658941.

The spelling of 80997189 in words is "eighty million, nine hundred ninety-seven thousand, one hundred eighty-nine".