79878959 has 2 divisors, whose sum is σ = 79878960. Its totient is φ = 79878958.

The previous prime is 79878943. The next prime is 79878961. The reversal of 79878959 is 95987897.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79878959 - 2⁴ = 79878943 is a prime.

Together with 79878961, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79878919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39939479 + 39939480.

It is an arithmetic number, because the mean of its divisors is an integer number (39939480).

Almost surely, 2^79878959 is an apocalyptic number.

79878959 is a deficient number, since it is larger than the sum of its proper divisors (1).

79878959 is an equidigital number, since it uses as much as digits as its factorization.

79878959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11430720, while the sum is 62.

The square root of 79878959 is about 8937.5029510485. The cubic root of 79878959 is about 430.6695158742.

The spelling of 79878959 in words is "seventy-nine million, eight hundred seventy-eight thousand, nine hundred fifty-nine".