79366321 has 4 divisors (see below), whose sum is σ = 79564644. Its totient is φ = 79168000.

The previous prime is 79366303. The next prime is 79366333. The reversal of 79366321 is 12366397.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12366397 = 19 ⋅650863.

It can be written as a sum of positive squares in 2 ways, for example, as 48441600 + 30924721 = 6960^2 + 5561^2 .

It is a cyclic number.

It is not a de Polignac number, because 79366321 - 2⁵ = 79366289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79366351) 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, 98560 + ... + 99361.

It is an arithmetic number, because the mean of its divisors is an integer number (19891161).

Almost surely, 2^79366321 is an apocalyptic number.

It is an amenable number.

79366321 is a deficient number, since it is larger than the sum of its proper divisors (198323).

79366321 is a wasteful number, since it uses less digits than its factorization.

79366321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198322.

The product of its digits is 40824, while the sum is 37.

The square root of 79366321 is about 8908.7777500620. Note that the first 4 decimals coincide. The cubic root of 79366321 is about 429.7462375091.

The spelling of 79366321 in words is "seventy-nine million, three hundred sixty-six thousand, three hundred twenty-one".