112908809 has 16 divisors (see below), whose sum is σ = 124047504. Its totient is φ = 102144000.

The previous prime is 112908799. The next prime is 112908823. The reversal of 112908809 is 908809211.

It can be written as a sum of positive squares in 8 ways, for example, as 35521600 + 77387209 = 5960^2 + 8797^2 .

It is a cyclic number.

It is not a de Polignac number, because 112908809 - 2⁸ = 112908553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (112908839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147989 + ... + 148749.

It is an arithmetic number, because the mean of its divisors is an integer number (7752969).

Almost surely, 2^112908809 is an apocalyptic number.

It is an amenable number.

112908809 is a deficient number, since it is larger than the sum of its proper divisors (11138695).

112908809 is a wasteful number, since it uses less digits than its factorization.

112908809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988.

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 112908809 is about 10625.8556831909. The cubic root of 112908809 is about 483.3287272913.

The spelling of 112908809 in words is "one hundred twelve million, nine hundred eight thousand, eight hundred nine".