80418139 has 2 divisors, whose sum is σ = 80418140. Its totient is φ = 80418138.

The previous prime is 80418133. The next prime is 80418161. The reversal of 80418139 is 93181408.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80418139 - 2⁷ = 80418011 is a prime.

It is a super-3 number, since 3×80418139³ (a number of 25 digits) contains 333 as substring.

It is equal to p_4692391 and since 80418139 and 4692391 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (80418133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40209069 + 40209070.

It is an arithmetic number, because the mean of its divisors is an integer number (40209070).

Almost surely, 2^80418139 is an apocalyptic number.

80418139 is a deficient number, since it is larger than the sum of its proper divisors (1).

80418139 is an equidigital number, since it uses as much as digits as its factorization.

80418139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 80418139 is about 8967.6161269314. The cubic root of 80418139 is about 431.6363448404.

The spelling of 80418139 in words is "eighty million, four hundred eighteen thousand, one hundred thirty-nine".