289849979 has 8 divisors (see below), whose sum is σ = 307411872. Its totient is φ = 272701440.

The previous prime is 289849943. The next prime is 289849981. The reversal of 289849979 is 979948982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 289849979 - 2⁸ = 289849723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289849919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101894 + ... + 104699.

It is an arithmetic number, because the mean of its divisors is an integer number (38426484).

Almost surely, 2^289849979 is an apocalyptic number.

289849979 is a deficient number, since it is larger than the sum of its proper divisors (17561893).

289849979 is a wasteful number, since it uses less digits than its factorization.

289849979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206677.

The product of its digits is 23514624, while the sum is 65.

The square root of 289849979 is about 17024.9810278896. The cubic root of 289849979 is about 661.7964366217.

The spelling of 289849979 in words is "two hundred eighty-nine million, eight hundred forty-nine thousand, nine hundred seventy-nine".