289994409 has 6 divisors (see below), whose sum is σ = 418880826. Its totient is φ = 193329600.

The previous prime is 289994407. The next prime is 289994413. The reversal of 289994409 is 904499982.

It can be written as a sum of positive squares in only one way, i.e., 269879184 + 20115225 = 16428^2 + 4485^2 .

It is not a de Polignac number, because 289994409 - 2¹ = 289994407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (289994407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16110792 + ... + 16110809.

It is an arithmetic number, because the mean of its divisors is an integer number (69813471).

Almost surely, 2^289994409 is an apocalyptic number.

It is an amenable number.

289994409 is a deficient number, since it is larger than the sum of its proper divisors (128886417).

289994409 is a wasteful number, since it uses less digits than its factorization.

289994409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32221607 (or 32221604 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The square root of 289994409 is about 17029.2222077228. Note that the first 4 decimals coincide. The cubic root of 289994409 is about 661.9063410487.

The spelling of 289994409 in words is "two hundred eighty-nine million, nine hundred ninety-four thousand, four hundred nine".