79143505 has 16 divisors (see below), whose sum is σ = 109505664. Its totient is φ = 53786880.

The previous prime is 79143451. The next prime is 79143541. The reversal of 79143505 is 50534197.

It is not a de Polignac number, because 79143505 - 2⁷ = 79143377 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 15 ways as a sum of consecutive naturals, for example, 6051 + ... + 13960.

It is an arithmetic number, because the mean of its divisors is an integer number (6844104).

Almost surely, 2^79143505 is an apocalyptic number.

It is an amenable number.

79143505 is a deficient number, since it is larger than the sum of its proper divisors (30362159).

79143505 is a wasteful number, since it uses less digits than its factorization.

79143505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20136.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 79143505 is about 8896.2635415100. The cubic root of 79143505 is about 429.3436986463.

The spelling of 79143505 in words is "seventy-nine million, one hundred forty-three thousand, five hundred five".