79971371 has 2 divisors, whose sum is σ = 79971372. Its totient is φ = 79971370.

The previous prime is 79971341. The next prime is 79971377. The reversal of 79971371 is 17317997.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (17317997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79971371 - 2¹⁰ = 79970347 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79971377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39985685 + 39985686.

It is an arithmetic number, because the mean of its divisors is an integer number (39985686).

Almost surely, 2^79971371 is an apocalyptic number.

79971371 is a deficient number, since it is larger than the sum of its proper divisors (1).

79971371 is an equidigital number, since it uses as much as digits as its factorization.

79971371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 83349, while the sum is 44.

The square root of 79971371 is about 8942.6713570387. The cubic root of 79971371 is about 430.8355324482.

The spelling of 79971371 in words is "seventy-nine million, nine hundred seventy-one thousand, three hundred seventy-one".