79319287 has 4 divisors (see below), whose sum is σ = 79391416. Its totient is φ = 79247160.

The previous prime is 79319269. The next prime is 79319291. The reversal of 79319287 is 78291397.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78291397 = 1723 ⋅45439.

It is a cyclic number.

It is not a de Polignac number, because 79319287 - 2⁷ = 79319159 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 (79319237) 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, 34389 + ... + 36622.

It is an arithmetic number, because the mean of its divisors is an integer number (19847854).

Almost surely, 2^79319287 is an apocalyptic number.

79319287 is a deficient number, since it is larger than the sum of its proper divisors (72129).

79319287 is a wasteful number, since it uses less digits than its factorization.

79319287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72128.

The product of its digits is 190512, while the sum is 46.

The square root of 79319287 is about 8906.1376027995. The cubic root of 79319287 is about 429.6613287871.

The spelling of 79319287 in words is "seventy-nine million, three hundred nineteen thousand, two hundred eighty-seven".