80997499 has 4 divisors (see below), whose sum is σ = 88360920. Its totient is φ = 73634080.

The previous prime is 80997491. The next prime is 80997517. The reversal of 80997499 is 99479908.

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

It is a cyclic number.

It is not a de Polignac number, because 80997499 - 2³ = 80997491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80997491) 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 3 ways as a sum of consecutive naturals, for example, 3681694 + ... + 3681715.

It is an arithmetic number, because the mean of its divisors is an integer number (22090230).

Almost surely, 2^80997499 is an apocalyptic number.

80997499 is a deficient number, since it is larger than the sum of its proper divisors (7363421).

80997499 is a wasteful number, since it uses less digits than its factorization.

80997499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7363420.

The product of its (nonzero) digits is 1469664, while the sum is 55.

The square root of 80997499 is about 8999.8610544830. The cubic root of 80997499 is about 432.6704178783.

The spelling of 80997499 in words is "eighty million, nine hundred ninety-seven thousand, four hundred ninety-nine".