79091893 has 2 divisors, whose sum is σ = 79091894. Its totient is φ = 79091892.

The previous prime is 79091867. The next prime is 79091899. The reversal of 79091893 is 39819097.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75916369 + 3175524 = 8713^2 + 1782^2 .

It is a cyclic number.

It is not a de Polignac number, because 79091893 - 2⁵ = 79091861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79091899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39545946 + 39545947.

It is an arithmetic number, because the mean of its divisors is an integer number (39545947).

Almost surely, 2^79091893 is an apocalyptic number.

It is an amenable number.

79091893 is a deficient number, since it is larger than the sum of its proper divisors (1).

79091893 is an equidigital number, since it uses as much as digits as its factorization.

79091893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 79091893 is about 8893.3623000528. The cubic root of 79091893 is about 429.2503487850.

The spelling of 79091893 in words is "seventy-nine million, ninety-one thousand, eight hundred ninety-three".