880807409 has 4 divisors (see below), whose sum is σ = 881546916. Its totient is φ = 880067904.

The previous prime is 880807397. The next prime is 880807423. The reversal of 880807409 is 904708088.

It is a happy number.

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 242487184 + 638320225 = 15572^2 + 25265^2 .

It is a cyclic number.

It is not a de Polignac number, because 880807409 - 2⁸ = 880807153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 880807409.

It is not an unprimeable number, because it can be changed into a prime (880807429) 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, 367964 + ... + 370349.

It is an arithmetic number, because the mean of its divisors is an integer number (220386729).

Almost surely, 2^880807409 is an apocalyptic number.

It is an amenable number.

880807409 is a deficient number, since it is larger than the sum of its proper divisors (739507).

880807409 is a wasteful number, since it uses less digits than its factorization.

880807409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739506.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 880807409 is about 29678.3997041619. The cubic root of 880807409 is about 958.5769602722.

The spelling of 880807409 in words is "eight hundred eighty million, eight hundred seven thousand, four hundred nine".