79684427 has 2 divisors, whose sum is σ = 79684428. Its totient is φ = 79684426.

The previous prime is 79684417. The next prime is 79684441. The reversal of 79684427 is 72448697.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79684427 - 2¹² = 79680331 is a prime.

It is not a weakly prime, because it can be changed into another prime (79684417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39842213 + 39842214.

It is an arithmetic number, because the mean of its divisors is an integer number (39842214).

Almost surely, 2^79684427 is an apocalyptic number.

79684427 is a deficient number, since it is larger than the sum of its proper divisors (1).

79684427 is an equidigital number, since it uses as much as digits as its factorization.

79684427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 47.

The square root of 79684427 is about 8926.6134115912. The cubic root of 79684427 is about 430.3196235478.

The spelling of 79684427 in words is "seventy-nine million, six hundred eighty-four thousand, four hundred twenty-seven".