113821619 has 2 divisors, whose sum is σ = 113821620. Its totient is φ = 113821618.

The previous prime is 113821573. The next prime is 113821621. The reversal of 113821619 is 916128311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 113821619 - 2⁸ = 113821363 is a prime.

It is a super-3 number, since 3×113821619³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

Together with 113821621, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (113821219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56910809 + 56910810.

It is an arithmetic number, because the mean of its divisors is an integer number (56910810).

Almost surely, 2^113821619 is an apocalyptic number.

113821619 is a deficient number, since it is larger than the sum of its proper divisors (1).

113821619 is an equidigital number, since it uses as much as digits as its factorization.

113821619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 32.

The square root of 113821619 is about 10668.7215260311. The cubic root of 113821619 is about 484.6277215451.

The spelling of 113821619 in words is "one hundred thirteen million, eight hundred twenty-one thousand, six hundred nineteen".