80719019 has 4 divisors (see below), whose sum is σ = 80765640. Its totient is φ = 80672400.

The previous prime is 80719007. The next prime is 80719027. The reversal of 80719019 is 91091708.

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 80719019 - 2¹⁶ = 80653483 is a prime.

It is a super-2 number, since 2×80719019² = 13031120056644722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80719019.

It is not an unprimeable number, because it can be changed into a prime (80719039) 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, 20609 + ... + 24210.

It is an arithmetic number, because the mean of its divisors is an integer number (20191410).

Almost surely, 2^80719019 is an apocalyptic number.

80719019 is a deficient number, since it is larger than the sum of its proper divisors (46621).

80719019 is a wasteful number, since it uses less digits than its factorization.

80719019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46620.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 80719019 is about 8984.3763834782. The cubic root of 80719019 is about 432.1739893437.

The spelling of 80719019 in words is "eighty million, seven hundred nineteen thousand, nineteen".