289982797 has 4 divisors (see below), whose sum is σ = 312289180. Its totient is φ = 267676416.

The previous prime is 289982789. The next prime is 289982839. The reversal of 289982797 is 797289982.

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 86378436 + 203604361 = 9294^2 + 14269^2 .

It is a cyclic number.

It is not a de Polignac number, because 289982797 - 2³ = 289982789 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 (289982197) 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, 11153172 + ... + 11153197.

It is an arithmetic number, because the mean of its divisors is an integer number (78072295).

Almost surely, 2^289982797 is an apocalyptic number.

It is an amenable number.

289982797 is a deficient number, since it is larger than the sum of its proper divisors (22306383).

289982797 is a wasteful number, since it uses less digits than its factorization.

289982797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22306382.

The product of its digits is 9144576, while the sum is 61.

The square root of 289982797 is about 17028.8812609637. The cubic root of 289982797 is about 661.8975062128.

The spelling of 289982797 in words is "two hundred eighty-nine million, nine hundred eighty-two thousand, seven hundred ninety-seven".