289409797 has 4 divisors (see below), whose sum is σ = 291082860. Its totient is φ = 287736736.

The previous prime is 289409789. The next prime is 289409801. The reversal of 289409797 is 797904982.

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 254434401 + 34975396 = 15951^2 + 5914^2 .

It is a cyclic number.

It is not a de Polignac number, because 289409797 - 2³ = 289409789 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 (289401797) 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, 836272 + ... + 836617.

It is an arithmetic number, because the mean of its divisors is an integer number (72770715).

Almost surely, 2^289409797 is an apocalyptic number.

It is an amenable number.

289409797 is a deficient number, since it is larger than the sum of its proper divisors (1673063).

289409797 is a wasteful number, since it uses less digits than its factorization.

289409797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673062.

The product of its (nonzero) digits is 2286144, while the sum is 55.

The square root of 289409797 is about 17012.0485832836. The cubic root of 289409797 is about 661.4612534906.

The spelling of 289409797 in words is "two hundred eighty-nine million, four hundred nine thousand, seven hundred ninety-seven".