118513 has 4 divisors (see below), whose sum is σ = 122368. Its totient is φ = 114660.

The previous prime is 118493. The next prime is 118529. The reversal of 118513 is 315811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 118513 - 2¹³ = 110321 is a prime.

It is a Duffinian number.

118513 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1881 + ... + 1942.

It is an arithmetic number, because the mean of its divisors is an integer number (30592).

2¹¹⁸⁵¹³ is an apocalyptic number.

It is an amenable number.

118513 is a deficient number, since it is larger than the sum of its proper divisors (3855).

118513 is an equidigital number, since it uses as much as digits as its factorization.

118513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3854.

The product of its digits is 120, while the sum is 19.

The square root of 118513 is about 344.2571713124. The cubic root of 118513 is about 49.1196575802.

It can be divided in two parts, 11851 and 3, that multiplied together give a palindrome (35553).

The spelling of 118513 in words is "one hundred eighteen thousand, five hundred thirteen".