79405505 has 4 divisors (see below), whose sum is σ = 95286612. Its totient is φ = 63524400.

The previous prime is 79405489. The next prime is 79405511. The reversal of 79405505 is 50550497.

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 43020481 + 36385024 = 6559^2 + 6032^2 .

It is not a de Polignac number, because 79405505 - 2⁴ = 79405489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7940546 + ... + 7940555.

It is an arithmetic number, because the mean of its divisors is an integer number (23821653).

Almost surely, 2^79405505 is an apocalyptic number.

It is an amenable number.

79405505 is a deficient number, since it is larger than the sum of its proper divisors (15881107).

79405505 is a wasteful number, since it uses less digits than its factorization.

79405505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15881106.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 79405505 is about 8910.9766580325. The cubic root of 79405505 is about 429.8169493084.

The spelling of 79405505 in words is "seventy-nine million, four hundred five thousand, five hundred five".