79985959 has 2 divisors, whose sum is σ = 79985960. Its totient is φ = 79985958.

The previous prime is 79985933. The next prime is 79985981. The reversal of 79985959 is 95958997.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (95958997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79985959 - 2¹³ = 79977767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79985897 and 79985906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79985159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39992979 + 39992980.

It is an arithmetic number, because the mean of its divisors is an integer number (39992980).

Almost surely, 2^79985959 is an apocalyptic number.

79985959 is a deficient number, since it is larger than the sum of its proper divisors (1).

79985959 is an equidigital number, since it uses as much as digits as its factorization.

79985959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9185400, while the sum is 61.

The square root of 79985959 is about 8943.4869597937. The cubic root of 79985959 is about 430.8617278502.

The spelling of 79985959 in words is "seventy-nine million, nine hundred eighty-five thousand, nine hundred fifty-nine".