289089397 has 4 divisors (see below), whose sum is σ = 289277100. Its totient is φ = 288901696.

The previous prime is 289089373. The next prime is 289089407. The reversal of 289089397 is 793980982.

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 111640356 + 177449041 = 10566^2 + 13321^2 .

It is a cyclic number.

It is not a de Polignac number, because 289089397 - 2¹¹ = 289087349 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 (289089347) 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, 91522 + ... + 94627.

It is an arithmetic number, because the mean of its divisors is an integer number (72319275).

Almost surely, 2^289089397 is an apocalyptic number.

It is an amenable number.

289089397 is a deficient number, since it is larger than the sum of its proper divisors (187703).

289089397 is a wasteful number, since it uses less digits than its factorization.

289089397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187702.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The square root of 289089397 is about 17002.6291202273. The cubic root of 289089397 is about 661.2170663615.

The spelling of 289089397 in words is "two hundred eighty-nine million, eighty-nine thousand, three hundred ninety-seven".