79928071 has 2 divisors, whose sum is σ = 79928072. Its totient is φ = 79928070.

The previous prime is 79928047. The next prime is 79928083. The reversal of 79928071 is 17082997.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79928071 - 2⁷ = 79927943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79926071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39964035 + 39964036.

It is an arithmetic number, because the mean of its divisors is an integer number (39964036).

Almost surely, 2^79928071 is an apocalyptic number.

79928071 is a deficient number, since it is larger than the sum of its proper divisors (1).

79928071 is an equidigital number, since it uses as much as digits as its factorization.

79928071 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 43.

The square root of 79928071 is about 8940.2500524314. The cubic root of 79928071 is about 430.7577606730.

The spelling of 79928071 in words is "seventy-nine million, nine hundred twenty-eight thousand, seventy-one".