80243239 has 2 divisors, whose sum is σ = 80243240. Its totient is φ = 80243238.

The previous prime is 80243231. The next prime is 80243249. The reversal of 80243239 is 93234208.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80243239 - 2³ = 80243231 is a prime.

It is a super-2 number, since 2×80243239² = 12877954810422242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80243239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80243231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40121619 + 40121620.

It is an arithmetic number, because the mean of its divisors is an integer number (40121620).

Almost surely, 2^80243239 is an apocalyptic number.

80243239 is a deficient number, since it is larger than the sum of its proper divisors (1).

80243239 is an equidigital number, since it uses as much as digits as its factorization.

80243239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 80243239 is about 8957.8590634147. The cubic root of 80243239 is about 431.3231982730.

The spelling of 80243239 in words is "eighty million, two hundred forty-three thousand, two hundred thirty-nine".