289399135 has 4 divisors (see below), whose sum is σ = 347278968. Its totient is φ = 231519304.

The previous prime is 289399129. The next prime is 289399141. The reversal of 289399135 is 531993982.

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

It is an interprime number because it is at equal distance from previous prime (289399129) and next prime (289399141).

It is a cyclic number.

It is not a de Polignac number, because 289399135 - 2¹³ = 289390943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28939909 + ... + 28939918.

It is an arithmetic number, because the mean of its divisors is an integer number (86819742).

Almost surely, 2^289399135 is an apocalyptic number.

289399135 is a deficient number, since it is larger than the sum of its proper divisors (57879833).

289399135 is an equidigital number, since it uses as much as digits as its factorization.

289399135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57879832.

The product of its digits is 524880, while the sum is 49.

The square root of 289399135 is about 17011.7352142572. The cubic root of 289399135 is about 661.4531305377.

It can be divided in two parts, 289 and 399135, that added together give a square (399424 = 632²).

The spelling of 289399135 in words is "two hundred eighty-nine million, three hundred ninety-nine thousand, one hundred thirty-five".