289146987 has 12 divisors (see below), whose sum is σ = 417821040. Its totient is φ = 192688848.

The previous prime is 289146983. The next prime is 289147051. The reversal of 289146987 is 789641982.

It is not a de Polignac number, because 289146987 - 2² = 289146983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (289146983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27189 + ... + 36297.

It is an arithmetic number, because the mean of its divisors is an integer number (34818420).

Almost surely, 2^289146987 is an apocalyptic number.

289146987 is a deficient number, since it is larger than the sum of its proper divisors (128674053).

289146987 is a wasteful number, since it uses less digits than its factorization.

289146987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12642 (or 12639 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 289146987 is about 17004.3225975044. The cubic root of 289146987 is about 661.2609708456.

The spelling of 289146987 in words is "two hundred eighty-nine million, one hundred forty-six thousand, nine hundred eighty-seven".