79219447 has 2 divisors, whose sum is σ = 79219448. Its totient is φ = 79219446.

The previous prime is 79219423. The next prime is 79219489. The reversal of 79219447 is 74491297.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79219447 - 2⁷ = 79219319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79219247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39609723 + 39609724.

It is an arithmetic number, because the mean of its divisors is an integer number (39609724).

Almost surely, 2^79219447 is an apocalyptic number.

79219447 is a deficient number, since it is larger than the sum of its proper divisors (1).

79219447 is an equidigital number, since it uses as much as digits as its factorization.

79219447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 43.

The square root of 79219447 is about 8900.5307145136. The cubic root of 79219447 is about 429.4809800566.

The spelling of 79219447 in words is "seventy-nine million, two hundred nineteen thousand, four hundred forty-seven".