80659619 has 2 divisors, whose sum is σ = 80659620. Its totient is φ = 80659618.

The previous prime is 80659591. The next prime is 80659729. The reversal of 80659619 is 91695608.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80659619 - 2⁸ = 80659363 is a prime.

It is a super-2 number, since 2×80659619² = 13011948274450322, 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 80659619.

It is not a weakly prime, because it can be changed into another prime (80659219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40329809 + 40329810.

It is an arithmetic number, because the mean of its divisors is an integer number (40329810).

Almost surely, 2^80659619 is an apocalyptic number.

80659619 is a deficient number, since it is larger than the sum of its proper divisors (1).

80659619 is an equidigital number, since it uses as much as digits as its factorization.

80659619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 80659619 is about 8981.0700364712. The cubic root of 80659619 is about 432.0679530594.

The spelling of 80659619 in words is "eighty million, six hundred fifty-nine thousand, six hundred nineteen".