289342647 has 12 divisors (see below), whose sum is σ = 455934024. Its totient is φ = 175359120.

The previous prime is 289342643. The next prime is 289342661. The reversal of 289342647 is 746243982.

It is not a de Polignac number, because 289342647 - 2² = 289342643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289342643) 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, 1461228 + ... + 1461425.

It is an arithmetic number, because the mean of its divisors is an integer number (37994502).

Almost surely, 2^289342647 is an apocalyptic number.

289342647 is a deficient number, since it is larger than the sum of its proper divisors (166591377).

289342647 is a wasteful number, since it uses less digits than its factorization.

289342647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2922670 (or 2922667 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 289342647 is about 17010.0748675601. The cubic root of 289342647 is about 661.4100912524.

The spelling of 289342647 in words is "two hundred eighty-nine million, three hundred forty-two thousand, six hundred forty-seven".