113209819 has 2 divisors, whose sum is σ = 113209820. Its totient is φ = 113209818.

The previous prime is 113209781. The next prime is 113209843. The reversal of 113209819 is 918902311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 113209819 - 2²¹ = 111112667 is a prime.

It is a super-2 number, since 2×113209819² = 25632926236025522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (113209319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56604909 + 56604910.

It is an arithmetic number, because the mean of its divisors is an integer number (56604910).

Almost surely, 2^113209819 is an apocalyptic number.

113209819 is a deficient number, since it is larger than the sum of its proper divisors (1).

113209819 is an equidigital number, since it uses as much as digits as its factorization.

113209819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 113209819 is about 10640.0102913484. The cubic root of 113209819 is about 483.7578573284.

The spelling of 113209819 in words is "one hundred thirteen million, two hundred nine thousand, eight hundred nineteen".