79219871 has 2 divisors, whose sum is σ = 79219872. Its totient is φ = 79219870.

The previous prime is 79219841. The next prime is 79219897. The reversal of 79219871 is 17891297.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79219871 - 2¹⁸ = 78957727 is a prime.

It is a super-2 number, since 2×79219871² = 12551575922513282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79219841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39609935 + 39609936.

It is an arithmetic number, because the mean of its divisors is an integer number (39609936).

Almost surely, 2^79219871 is an apocalyptic number.

79219871 is a deficient number, since it is larger than the sum of its proper divisors (1).

79219871 is an equidigital number, since it uses as much as digits as its factorization.

79219871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 44.

The square root of 79219871 is about 8900.5545332861. The cubic root of 79219871 is about 429.4817462810.

The spelling of 79219871 in words is "seventy-nine million, two hundred nineteen thousand, eight hundred seventy-one".