79419823 has 4 divisors (see below), whose sum is σ = 90765520. Its totient is φ = 68074128.

The previous prime is 79419803. The next prime is 79419827. The reversal of 79419823 is 32891497.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32891497 = 59 ⋅557483.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79419823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79419823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79419827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5672838 + ... + 5672851.

It is an arithmetic number, because the mean of its divisors is an integer number (22691380).

Almost surely, 2^79419823 is an apocalyptic number.

79419823 is a deficient number, since it is larger than the sum of its proper divisors (11345697).

79419823 is a wasteful number, since it uses less digits than its factorization.

79419823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11345696.

The product of its digits is 108864, while the sum is 43.

The square root of 79419823 is about 8911.7800129940. The cubic root of 79419823 is about 429.8427818970.

The spelling of 79419823 in words is "seventy-nine million, four hundred nineteen thousand, eight hundred twenty-three".