289283987 has 8 divisors (see below), whose sum is σ = 311937360. Its totient is φ = 267373440.

The previous prime is 289283977. The next prime is 289283989. The reversal of 289283987 is 789382982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 289283987 - 2²⁰ = 288235411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289283989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184898 + ... + 186455.

It is an arithmetic number, because the mean of its divisors is an integer number (38992170).

Almost surely, 2^289283987 is an apocalyptic number.

289283987 is a deficient number, since it is larger than the sum of its proper divisors (22653373).

289283987 is a wasteful number, since it uses less digits than its factorization.

289283987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371413.

The product of its digits is 3483648, while the sum is 56.

The square root of 289283987 is about 17008.3505079123. The cubic root of 289283987 is about 661.3653911497.

The spelling of 289283987 in words is "two hundred eighty-nine million, two hundred eighty-three thousand, nine hundred eighty-seven".