115779 has 4 divisors (see below), whose sum is σ = 154376. Its totient is φ = 77184.

The previous prime is 115777. The next prime is 115781. The reversal of 115779 is 977511.

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 (115777) and next prime (115781).

It is not a de Polignac number, because 115779 - 2¹ = 115777 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 10 and base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19294 + ... + 19299.

It is an arithmetic number, because the mean of its divisors is an integer number (38594).

2¹¹⁵⁷⁷⁹ is an apocalyptic number.

115779 is a deficient number, since it is larger than the sum of its proper divisors (38597).

115779 is an equidigital number, since it uses as much as digits as its factorization.

115779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38596.

The product of its digits is 2205, while the sum is 30.

The square root of 115779 is about 340.2631334717. The cubic root of 115779 is about 48.7389981748.

The spelling of 115779 in words is "one hundred fifteen thousand, seven hundred seventy-nine".