79141921 has 2 divisors, whose sum is σ = 79141922. Its totient is φ = 79141920.

The previous prime is 79141891. The next prime is 79141939. The reversal of 79141921 is 12914197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71656225 + 7485696 = 8465^2 + 2736^2 .

It is a cyclic number.

It is not a de Polignac number, because 79141921 - 2⁷ = 79141793 is a prime.

It is not a weakly prime, because it can be changed into another prime (79141981) 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, 39570960 + 39570961.

It is an arithmetic number, because the mean of its divisors is an integer number (39570961).

Almost surely, 2^79141921 is an apocalyptic number.

It is an amenable number.

79141921 is a deficient number, since it is larger than the sum of its proper divisors (1).

79141921 is an equidigital number, since it uses as much as digits as its factorization.

79141921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 34.

The square root of 79141921 is about 8896.1745149249. The cubic root of 79141921 is about 429.3408342927.

The spelling of 79141921 in words is "seventy-nine million, one hundred forty-one thousand, nine hundred twenty-one".