289356261 has 8 divisors (see below), whose sum is σ = 402582720. Its totient is φ = 184516992.

The previous prime is 289356251. The next prime is 289356271. The reversal of 289356261 is 162653982.

It is an interprime number because it is at equal distance from previous prime (289356251) and next prime (289356271).

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

It is not a de Polignac number, because 289356261 - 2¹¹ = 289354213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289356251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2096716 + ... + 2096853.

It is an arithmetic number, because the mean of its divisors is an integer number (50322840).

Almost surely, 2^289356261 is an apocalyptic number.

It is an amenable number.

289356261 is a deficient number, since it is larger than the sum of its proper divisors (113226459).

289356261 is a wasteful number, since it uses less digits than its factorization.

289356261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4193595.

The product of its digits is 155520, while the sum is 42.

The square root of 289356261 is about 17010.4750374585. The cubic root of 289356261 is about 661.4204645312.

The spelling of 289356261 in words is "two hundred eighty-nine million, three hundred fifty-six thousand, two hundred sixty-one".