289897471 has 4 divisors (see below), whose sum is σ = 291633552. Its totient is φ = 288161392.

The previous prime is 289897463. The next prime is 289897499. The reversal of 289897471 is 174798982.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 289897471 - 2³ = 289897463 is a prime.

It is a super-3 number, since 3×289897471³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289897411) 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, 867790 + ... + 868123.

It is an arithmetic number, because the mean of its divisors is an integer number (72908388).

Almost surely, 2^289897471 is an apocalyptic number.

289897471 is a deficient number, since it is larger than the sum of its proper divisors (1736081).

289897471 is a wasteful number, since it uses less digits than its factorization.

289897471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736080.

The product of its digits is 2032128, while the sum is 55.

The square root of 289897471 is about 17026.3757447086. The cubic root of 289897471 is about 661.8325798247.

The spelling of 289897471 in words is "two hundred eighty-nine million, eight hundred ninety-seven thousand, four hundred seventy-one".