80687839 has 2 divisors, whose sum is σ = 80687840. Its totient is φ = 80687838.

The previous prime is 80687819. The next prime is 80687843. The reversal of 80687839 is 93878608.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80687839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80687792 and 80687801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80687819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40343919 + 40343920.

It is an arithmetic number, because the mean of its divisors is an integer number (40343920).

Almost surely, 2^80687839 is an apocalyptic number.

80687839 is a deficient number, since it is larger than the sum of its proper divisors (1).

80687839 is an equidigital number, since it uses as much as digits as its factorization.

80687839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 80687839 is about 8982.6409813595. The cubic root of 80687839 is about 432.1183357089.

The spelling of 80687839 in words is "eighty million, six hundred eighty-seven thousand, eight hundred thirty-nine".