289409397 has 16 divisors (see below), whose sum is σ = 398960640. Its totient is φ = 186418800.

The previous prime is 289409383. The next prime is 289409401. The reversal of 289409397 is 793904982.

It is not a de Polignac number, because 289409397 - 2⁶ = 289409333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289409317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66622 + ... + 70832.

It is an arithmetic number, because the mean of its divisors is an integer number (24935040).

Almost surely, 2^289409397 is an apocalyptic number.

It is an amenable number.

289409397 is a deficient number, since it is larger than the sum of its proper divisors (109551243).

289409397 is a wasteful number, since it uses less digits than its factorization.

289409397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4984.

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 289409397 is about 17012.0368269058. The cubic root of 289409397 is about 661.4609487502.

The spelling of 289409397 in words is "two hundred eighty-nine million, four hundred nine thousand, three hundred ninety-seven".