80239139 has 2 divisors, whose sum is σ = 80239140. Its totient is φ = 80239138.

The previous prime is 80239127. The next prime is 80239141. The reversal of 80239139 is 93193208.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80239139 - 2⁴ = 80239123 is a prime.

It is a super-2 number, since 2×80239139² = 12876638854922642, which contains 22 as substring.

Together with 80239141, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_4682474 and since 80239139 and 4682474 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 80239099 and 80239108.

It is not a weakly prime, because it can be changed into another prime (80239169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40119569 + 40119570.

It is an arithmetic number, because the mean of its divisors is an integer number (40119570).

Almost surely, 2^80239139 is an apocalyptic number.

80239139 is a deficient number, since it is larger than the sum of its proper divisors (1).

80239139 is an equidigital number, since it uses as much as digits as its factorization.

80239139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 80239139 is about 8957.6302111663. The cubic root of 80239139 is about 431.3158520457.

The spelling of 80239139 in words is "eighty million, two hundred thirty-nine thousand, one hundred thirty-nine".