79171439 has 2 divisors, whose sum is σ = 79171440. Its totient is φ = 79171438.

The previous prime is 79171429. The next prime is 79171457. The reversal of 79171439 is 93417197.

It is a weak prime.

It is an emirp because it is prime and its reverse (93417197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79171439 - 2¹⁶ = 79105903 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 79171396 and 79171405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79171409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39585719 + 39585720.

It is an arithmetic number, because the mean of its divisors is an integer number (39585720).

Almost surely, 2^79171439 is an apocalyptic number.

79171439 is a deficient number, since it is larger than the sum of its proper divisors (1).

79171439 is an equidigital number, since it uses as much as digits as its factorization.

79171439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 41.

The square root of 79171439 is about 8897.8333879659. The cubic root of 79171439 is about 429.3942055330.

The spelling of 79171439 in words is "seventy-nine million, one hundred seventy-one thousand, four hundred thirty-nine".