79878379 has 12 divisors (see below), whose sum is σ = 96961104. Its totient is φ = 65489424.

The previous prime is 79878371. The next prime is 79878397. The reversal of 79878379 is 97387897.

It is a happy number.

It is not a de Polignac number, because 79878379 - 2³ = 79878371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79878371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34312 + ... + 36565.

It is an arithmetic number, because the mean of its divisors is an integer number (8080092).

Almost surely, 2^79878379 is an apocalyptic number.

79878379 is a deficient number, since it is larger than the sum of its proper divisors (17082725).

79878379 is a wasteful number, since it uses less digits than its factorization.

79878379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70914 (or 70907 counting only the distinct ones).

The product of its digits is 5334336, while the sum is 58.

The square root of 79878379 is about 8937.4705034478. The cubic root of 79878379 is about 430.6684735100.

The spelling of 79878379 in words is "seventy-nine million, eight hundred seventy-eight thousand, three hundred seventy-nine".