79812847 has 2 divisors, whose sum is σ = 79812848. Its totient is φ = 79812846.

The previous prime is 79812823. The next prime is 79812851. The reversal of 79812847 is 74821897.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79812847 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 79812797 and 79812806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79812857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39906423 + 39906424.

It is an arithmetic number, because the mean of its divisors is an integer number (39906424).

Almost surely, 2^79812847 is an apocalyptic number.

79812847 is a deficient number, since it is larger than the sum of its proper divisors (1).

79812847 is an equidigital number, since it uses as much as digits as its factorization.

79812847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 46.

The square root of 79812847 is about 8933.8036132434. The cubic root of 79812847 is about 430.5506682157.

The spelling of 79812847 in words is "seventy-nine million, eight hundred twelve thousand, eight hundred forty-seven".