80039819 has 2 divisors, whose sum is σ = 80039820. Its totient is φ = 80039818.

The previous prime is 80039809. The next prime is 80039833. The reversal of 80039819 is 91893008.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80039819 - 2⁴ = 80039803 is a prime.

It is a super-2 number, since 2×80039819² = 12812745251105522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80039809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40019909 + 40019910.

It is an arithmetic number, because the mean of its divisors is an integer number (40019910).

Almost surely, 2^80039819 is an apocalyptic number.

80039819 is a deficient number, since it is larger than the sum of its proper divisors (1).

80039819 is an equidigital number, since it uses as much as digits as its factorization.

80039819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 80039819 is about 8946.4975828533. The cubic root of 80039819 is about 430.9584156778.

The spelling of 80039819 in words is "eighty million, thirty-nine thousand, eight hundred nineteen".