113513819 has 4 divisors (see below), whose sum is σ = 113535240. Its totient is φ = 113492400.

The previous prime is 113513791. The next prime is 113513821. The reversal of 113513819 is 918315311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 918315311 = 7789 ⋅117899.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113513819 is a prime.

It is a super-2 number, since 2×113513819² = 25770774207929522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113513219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3719 + ... + 15519.

It is an arithmetic number, because the mean of its divisors is an integer number (28383810).

Almost surely, 2^113513819 is an apocalyptic number.

113513819 is a deficient number, since it is larger than the sum of its proper divisors (21421).

113513819 is an equidigital number, since it uses as much as digits as its factorization.

113513819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21420.

The product of its digits is 3240, while the sum is 32.

The square root of 113513819 is about 10654.2864143968. The cubic root of 113513819 is about 484.1904786664.

The spelling of 113513819 in words is "one hundred thirteen million, five hundred thirteen thousand, eight hundred nineteen".