115783 has 2 divisors, whose sum is σ = 115784. Its totient is φ = 115782.

The previous prime is 115781. The next prime is 115793. The reversal of 115783 is 387511.

115783 is nontrivially palindromic in base 2.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 115783 - 2¹ = 115781 is a prime.

Together with 115781, it forms a pair of twin primes.

115783 is a lucky number.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57891 + 57892.

It is an arithmetic number, because the mean of its divisors is an integer number (57892).

2¹¹⁵⁷⁸³ is an apocalyptic number.

115783 is a deficient number, since it is larger than the sum of its proper divisors (1).

115783 is an equidigital number, since it uses as much as digits as its factorization.

115783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 25.

The square root of 115783 is about 340.2690112249. The cubic root of 115783 is about 48.7395594560.

It can be divided in two parts, 115 and 783, that added together give a palindrome (898).

The spelling of 115783 in words is "one hundred fifteen thousand, seven hundred eighty-three".