289742979 has 4 divisors (see below), whose sum is σ = 386323976. Its totient is φ = 193161984.

The previous prime is 289742969. The next prime is 289742993. The reversal of 289742979 is 979247982.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 289742979 - 2⁷ = 289742851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289742909) 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, 48290494 + ... + 48290499.

It is an arithmetic number, because the mean of its divisors is an integer number (96580994).

Almost surely, 2^289742979 is an apocalyptic number.

289742979 is a deficient number, since it is larger than the sum of its proper divisors (96580997).

289742979 is an equidigital number, since it uses as much as digits as its factorization.

289742979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96580996.

The product of its digits is 4572288, while the sum is 57.

The square root of 289742979 is about 17021.8382967293. The cubic root of 289742979 is about 661.7149911162.

The spelling of 289742979 in words is "two hundred eighty-nine million, seven hundred forty-two thousand, nine hundred seventy-nine".