19100113 has 2 divisors, whose sum is σ = 19100114. Its totient is φ = 19100112.

The previous prime is 19100101. The next prime is 19100117. The reversal of 19100113 is 31100191.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15776784 + 3323329 = 3972^2 + 1823^2 .

It is a cyclic number.

It is not a de Polignac number, because 19100113 - 2⁹ = 19099601 is a prime.

It is a super-2 number, since 2×19100113² = 729628633225538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19100117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9550056 + 9550057.

It is an arithmetic number, because the mean of its divisors is an integer number (9550057).

Almost surely, 2^19100113 is an apocalyptic number.

It is an amenable number.

19100113 is a deficient number, since it is larger than the sum of its proper divisors (1).

19100113 is an equidigital number, since it uses as much as digits as its factorization.

19100113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27, while the sum is 16.

The square root of 19100113 is about 4370.3676046758. The cubic root of 19100113 is about 267.3080137559.

The spelling of 19100113 in words is "nineteen million, one hundred thousand, one hundred thirteen".