79436405 has 4 divisors (see below), whose sum is σ = 95323692. Its totient is φ = 63549120.

The previous prime is 79436369. The next prime is 79436407. The reversal of 79436405 is 50463497.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62188996 + 17247409 = 7886^2 + 4153^2 .

It is not a de Polignac number, because 79436405 - 2¹⁶ = 79370869 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 (79436407) 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, 7943636 + ... + 7943645.

It is an arithmetic number, because the mean of its divisors is an integer number (23830923).

Almost surely, 2^79436405 is an apocalyptic number.

It is an amenable number.

79436405 is a deficient number, since it is larger than the sum of its proper divisors (15887287).

79436405 is a wasteful number, since it uses less digits than its factorization.

79436405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15887286.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 79436405 is about 8912.7103060741. The cubic root of 79436405 is about 429.8726953231.

The spelling of 79436405 in words is "seventy-nine million, four hundred thirty-six thousand, four hundred five".