80974819 has 4 divisors (see below), whose sum is σ = 81612544. Its totient is φ = 80337096.

The previous prime is 80974801. The next prime is 80974849. The reversal of 80974819 is 91847908.

It is a happy number.

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 80974819 - 2⁵ = 80974787 is a prime.

It is a super-2 number, since 2×80974819² = 13113842624165522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80974849) 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, 318672 + ... + 318925.

It is an arithmetic number, because the mean of its divisors is an integer number (20403136).

Almost surely, 2^80974819 is an apocalyptic number.

80974819 is a deficient number, since it is larger than the sum of its proper divisors (637725).

80974819 is a wasteful number, since it uses less digits than its factorization.

80974819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637724.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 80974819 is about 8998.6009468139. The cubic root of 80974819 is about 432.6300302892.

The spelling of 80974819 in words is "eighty million, nine hundred seventy-four thousand, eight hundred nineteen".