365689 has 2 divisors, whose sum is σ = 365690. Its totient is φ = 365688.

The previous prime is 365683. The next prime is 365699. The reversal of 365689 is 986563.

365689 is nontrivially palindromic in base 13.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 354025 + 11664 = 595^2 + 108^2 .

It is an emirp because it is prime and its reverse (986563) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 365689 - 2¹⁵ = 332921 is a prime.

It is a super-3 number, since 3×365689³ = 146709063664733307, which contains 333 as substring.

365689 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (365683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182844 + 182845.

It is an arithmetic number, because the mean of its divisors is an integer number (182845).

2³⁶⁵⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

365689 is a deficient number, since it is larger than the sum of its proper divisors (1).

365689 is an equidigital number, since it uses as much as digits as its factorization.

365689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The square root of 365689 is about 604.7222502935. The cubic root of 365689 is about 71.5106346351.

The spelling of 365689 in words is "three hundred sixty-five thousand, six hundred eighty-nine".