79677047 has 2 divisors, whose sum is σ = 79677048. Its totient is φ = 79677046.

The previous prime is 79677043. The next prime is 79677067. The reversal of 79677047 is 74077697.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (74077697) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79677047 - 2² = 79677043 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 79676992 and 79677010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79677043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39838523 + 39838524.

It is an arithmetic number, because the mean of its divisors is an integer number (39838524).

Almost surely, 2^79677047 is an apocalyptic number.

79677047 is a deficient number, since it is larger than the sum of its proper divisors (1).

79677047 is an equidigital number, since it uses as much as digits as its factorization.

79677047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518616, while the sum is 47.

The square root of 79677047 is about 8926.2000313683. The cubic root of 79677047 is about 430.3063384054.

The spelling of 79677047 in words is "seventy-nine million, six hundred seventy-seven thousand, forty-seven".