79534409 has 4 divisors (see below), whose sum is σ = 79567104. Its totient is φ = 79501716.

The previous prime is 79534373. The next prime is 79534421. The reversal of 79534409 is 90443597.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90443597 = 4657 ⋅19421.

It is a cyclic number.

It is not a de Polignac number, because 79534409 - 2¹² = 79530313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79534439) 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, 12377 + ... + 17670.

It is an arithmetic number, because the mean of its divisors is an integer number (19891776).

Almost surely, 2^79534409 is an apocalyptic number.

It is an amenable number.

79534409 is a deficient number, since it is larger than the sum of its proper divisors (32695).

79534409 is a wasteful number, since it uses less digits than its factorization.

79534409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32694.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 79534409 is about 8918.2066022267. The cubic root of 79534409 is about 430.0494066179.

The spelling of 79534409 in words is "seventy-nine million, five hundred thirty-four thousand, four hundred nine".