80999061 has 32 divisors (see below), whose sum is σ = 127478400. Its totient is φ = 45100800.

The previous prime is 80999029. The next prime is 80999069. The reversal of 80999061 is 16099908.

It is not a de Polignac number, because 80999061 - 2⁵ = 80999029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80999069) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149451 + ... + 149991.

It is an arithmetic number, because the mean of its divisors is an integer number (3983700).

Almost surely, 2^80999061 is an apocalyptic number.

It is an amenable number.

80999061 is a deficient number, since it is larger than the sum of its proper divisors (46479339).

80999061 is a wasteful number, since it uses less digits than its factorization.

80999061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 80999061 is about 8999.9478331821. The cubic root of 80999061 is about 432.6731991446.

The spelling of 80999061 in words is "eighty million, nine hundred ninety-nine thousand, sixty-one".