289432887 has 4 divisors (see below), whose sum is σ = 385910520. Its totient is φ = 192955256.

The previous prime is 289432883. The next prime is 289432901. The reversal of 289432887 is 788234982.

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 289432887 - 2² = 289432883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289432883) 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, 48238812 + ... + 48238817.

It is an arithmetic number, because the mean of its divisors is an integer number (96477630).

Almost surely, 2^289432887 is an apocalyptic number.

289432887 is a deficient number, since it is larger than the sum of its proper divisors (96477633).

289432887 is an equidigital number, since it uses as much as digits as its factorization.

289432887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96477632.

The product of its digits is 1548288, while the sum is 51.

The square root of 289432887 is about 17012.7272064181. The cubic root of 289432887 is about 661.4788441577.

The spelling of 289432887 in words is "two hundred eighty-nine million, four hundred thirty-two thousand, eight hundred eighty-seven".