79278393 has 16 divisors (see below), whose sum is σ = 111458880. Its totient is φ = 49984704.

The previous prime is 79278371. The next prime is 79278413. The reversal of 79278393 is 39387297.

It is not a de Polignac number, because 79278393 - 2¹² = 79274297 is a prime.

It is a Curzon number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (79278343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57055 + ... + 58427.

It is an arithmetic number, because the mean of its divisors is an integer number (6966180).

Almost surely, 2^79278393 is an apocalyptic number.

It is an amenable number.

79278393 is a deficient number, since it is larger than the sum of its proper divisors (32180487).

79278393 is a wasteful number, since it uses less digits than its factorization.

79278393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408.

The product of its digits is 571536, while the sum is 48.

The square root of 79278393 is about 8903.8414743301. The cubic root of 79278393 is about 429.5874770944.

The spelling of 79278393 in words is "seventy-nine million, two hundred seventy-eight thousand, three hundred ninety-three".