79725563 has 12 divisors (see below), whose sum is σ = 85874040. Its totient is φ = 73988352.

The previous prime is 79725559. The next prime is 79725623. The reversal of 79725563 is 36552797.

It is not a de Polignac number, because 79725563 - 2² = 79725559 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79725523) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 19208 + ... + 22986.

It is an arithmetic number, because the mean of its divisors is an integer number (7156170).

Almost surely, 2^79725563 is an apocalyptic number.

79725563 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

79725563 is a deficient number, since it is larger than the sum of its proper divisors (6148477).

79725563 is a wasteful number, since it uses less digits than its factorization.

79725563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3886 (or 3869 counting only the distinct ones).

The product of its digits is 396900, while the sum is 44.

The square root of 79725563 is about 8928.9172355891. The cubic root of 79725563 is about 430.3936596905.

The spelling of 79725563 in words is "seventy-nine million, seven hundred twenty-five thousand, five hundred sixty-three".