79539479 has 4 divisors (see below), whose sum is σ = 79713984. Its totient is φ = 79364976.

The previous prime is 79539461. The next prime is 79539517. The reversal of 79539479 is 97493597.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97493597 = 239 ⋅407923.

It is a cyclic number.

It is not a de Polignac number, because 79539479 - 2⁸ = 79539223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79539479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79539079) 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, 86567 + ... + 87480.

It is an arithmetic number, because the mean of its divisors is an integer number (19928496).

Almost surely, 2^79539479 is an apocalyptic number.

79539479 is a deficient number, since it is larger than the sum of its proper divisors (174505).

79539479 is a wasteful number, since it uses less digits than its factorization.

79539479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174504.

The product of its digits is 2143260, while the sum is 53.

The square root of 79539479 is about 8918.4908476715. The cubic root of 79539479 is about 430.0585443995.

The spelling of 79539479 in words is "seventy-nine million, five hundred thirty-nine thousand, four hundred seventy-nine".