79977827 has 2 divisors, whose sum is σ = 79977828. Its totient is φ = 79977826.

The previous prime is 79977823. The next prime is 79977829. The reversal of 79977827 is 72877997.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79977827 - 2² = 79977823 is a prime.

Together with 79977829, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79977823) 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, 39988913 + 39988914.

It is an arithmetic number, because the mean of its divisors is an integer number (39988914).

Almost surely, 2^79977827 is an apocalyptic number.

79977827 is a deficient number, since it is larger than the sum of its proper divisors (1).

79977827 is an equidigital number, since it uses as much as digits as its factorization.

79977827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3111696, while the sum is 56.

The square root of 79977827 is about 8943.0323157193. The cubic root of 79977827 is about 430.8471257610.

The spelling of 79977827 in words is "seventy-nine million, nine hundred seventy-seven thousand, eight hundred twenty-seven".