79090447 has 2 divisors, whose sum is σ = 79090448. Its totient is φ = 79090446.

The previous prime is 79090421. The next prime is 79090457. The reversal of 79090447 is 74409097.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79090447 - 2¹⁵ = 79057679 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79090457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39545223 + 39545224.

It is an arithmetic number, because the mean of its divisors is an integer number (39545224).

Almost surely, 2^79090447 is an apocalyptic number.

79090447 is a deficient number, since it is larger than the sum of its proper divisors (1).

79090447 is an equidigital number, since it uses as much as digits as its factorization.

79090447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 79090447 is about 8893.2810030944. The cubic root of 79090447 is about 429.2477328414.

The spelling of 79090447 in words is "seventy-nine million, ninety thousand, four hundred forty-seven".