289949479 has 4 divisors (see below), whose sum is σ = 299302720. Its totient is φ = 280596240.

The previous prime is 289949459. The next prime is 289949489. The reversal of 289949479 is 974949982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 974949982 = 2 ⋅487474991.

It is a cyclic number.

It is not a de Polignac number, because 289949479 - 2⁵ = 289949447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289949449) 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, 4676574 + ... + 4676635.

It is an arithmetic number, because the mean of its divisors is an integer number (74825680).

Almost surely, 2^289949479 is an apocalyptic number.

289949479 is a deficient number, since it is larger than the sum of its proper divisors (9353241).

289949479 is an equidigital number, since it uses as much as digits as its factorization.

289949479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9353240.

The product of its digits is 11757312, while the sum is 61.

The square root of 289949479 is about 17027.9029536816. The cubic root of 289949479 is about 661.8721553460.

The spelling of 289949479 in words is "two hundred eighty-nine million, nine hundred forty-nine thousand, four hundred seventy-nine".