79338691 has 4 divisors (see below), whose sum is σ = 79405312. Its totient is φ = 79272072.

The previous prime is 79338671. The next prime is 79338739. The reversal of 79338691 is 19683397.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19683397 = 227 ⋅86711.

It is a cyclic number.

It is not a de Polignac number, because 79338691 - 2⁵ = 79338659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79338671) 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, 31491 + ... + 33916.

It is an arithmetic number, because the mean of its divisors is an integer number (19851328).

Almost surely, 2^79338691 is an apocalyptic number.

79338691 is a deficient number, since it is larger than the sum of its proper divisors (66621).

79338691 is a wasteful number, since it uses less digits than its factorization.

79338691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66620.

The product of its digits is 244944, while the sum is 46.

The square root of 79338691 is about 8907.2268973009. The cubic root of 79338691 is about 429.6963621692.

The spelling of 79338691 in words is "seventy-nine million, three hundred thirty-eight thousand, six hundred ninety-one".