79419991 has 8 divisors (see below), whose sum is σ = 92120960. Its totient is φ = 67057848.

The previous prime is 79419983. The next prime is 79419997. The reversal of 79419991 is 19991497.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79419991 - 2³ = 79419983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79419997) 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 7 ways as a sum of consecutive naturals, for example, 84201 + ... + 85138.

It is an arithmetic number, because the mean of its divisors is an integer number (11515120).

Almost surely, 2^79419991 is an apocalyptic number.

79419991 is a deficient number, since it is larger than the sum of its proper divisors (12700969).

79419991 is a wasteful number, since it uses less digits than its factorization.

79419991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169413.

The product of its digits is 183708, while the sum is 49.

The square root of 79419991 is about 8911.7894387154. The cubic root of 79419991 is about 429.8430849848.

The spelling of 79419991 in words is "seventy-nine million, four hundred nineteen thousand, nine hundred ninety-one".