912433909 has 4 divisors (see below), whose sum is σ = 914227020. Its totient is φ = 910640800.

The previous prime is 912433901. The next prime is 912433919. The reversal of 912433909 is 909334219.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 909334219 = 2251 ⋅403969.

It can be written as a sum of positive squares in 2 ways, for example, as 696432100 + 216001809 = 26390^2 + 14697^2 .

It is a cyclic number.

It is not a de Polignac number, because 912433909 - 2³ = 912433901 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (912433901) 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, 895792 + ... + 896809.

It is an arithmetic number, because the mean of its divisors is an integer number (228556755).

Almost surely, 2^912433909 is an apocalyptic number.

It is an amenable number.

912433909 is a deficient number, since it is larger than the sum of its proper divisors (1793111).

912433909 is a wasteful number, since it uses less digits than its factorization.

912433909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1793110.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 912433909 is about 30206.5209681618. The cubic root of 912433909 is about 969.9152896585.

The spelling of 912433909 in words is "nine hundred twelve million, four hundred thirty-three thousand, nine hundred nine".