79220047 has 2 divisors, whose sum is σ = 79220048. Its totient is φ = 79220046.

The previous prime is 79220041. The next prime is 79220087. The reversal of 79220047 is 74002297.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79220047 - 2³ = 79220039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79220041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39610023 + 39610024.

It is an arithmetic number, because the mean of its divisors is an integer number (39610024).

Almost surely, 2^79220047 is an apocalyptic number.

79220047 is a deficient number, since it is larger than the sum of its proper divisors (1).

79220047 is an equidigital number, since it uses as much as digits as its factorization.

79220047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 79220047 is about 8900.5644203050. The cubic root of 79220047 is about 429.4820643356.

The spelling of 79220047 in words is "seventy-nine million, two hundred twenty thousand, forty-seven".