113161819 has 2 divisors, whose sum is σ = 113161820. Its totient is φ = 113161818.

The previous prime is 113161801. The next prime is 113161871. The reversal of 113161819 is 918161311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 113161819 - 2⁷ = 113161691 is a prime.

It is a super-2 number, since 2×113161819² = 25611194558777522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (113161879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56580909 + 56580910.

It is an arithmetic number, because the mean of its divisors is an integer number (56580910).

Almost surely, 2^113161819 is an apocalyptic number.

113161819 is a deficient number, since it is larger than the sum of its proper divisors (1).

113161819 is an equidigital number, since it uses as much as digits as its factorization.

113161819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 31.

The square root of 113161819 is about 10637.7544152890. The cubic root of 113161819 is about 483.6894779249.

The spelling of 113161819 in words is "one hundred thirteen million, one hundred sixty-one thousand, eight hundred nineteen".