79419091 has 4 divisors (see below), whose sum is σ = 81356184. Its totient is φ = 77482000.

The previous prime is 79419089. The next prime is 79419101. The reversal of 79419091 is 19091497.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79419091 - 2¹ = 79419089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79419491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 968485 + ... + 968566.

It is an arithmetic number, because the mean of its divisors is an integer number (20339046).

Almost surely, 2^79419091 is an apocalyptic number.

79419091 is a deficient number, since it is larger than the sum of its proper divisors (1937093).

79419091 is a wasteful number, since it uses less digits than its factorization.

79419091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937092.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 79419091 is about 8911.7389436630. The cubic root of 79419091 is about 429.8414612952.

The spelling of 79419091 in words is "seventy-nine million, four hundred nineteen thousand, ninety-one".