289043378317 has 4 divisors (see below), whose sum is σ = 291695152540. Its totient is φ = 286391604096.

The previous prime is 289043378251. The next prime is 289043378321. The reversal of 289043378317 is 713873340982.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 170353482121 + 118689896196 = 412739^2 + 344514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-289043378317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209043378317) 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, 1325886948 + ... + 1325887165.

It is an arithmetic number, because the mean of its divisors is an integer number (72923788135).

Almost surely, 2^289043378317 is an apocalyptic number.

It is an amenable number.

289043378317 is a deficient number, since it is larger than the sum of its proper divisors (2651774223).

289043378317 is a wasteful number, since it uses less digits than its factorization.

289043378317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2651774222.

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 289043378317 in words is "two hundred eighty-nine billion, forty-three million, three hundred seventy-eight thousand, three hundred seventeen".