19189013 has 2 divisors, whose sum is σ = 19189014. Its totient is φ = 19189012.

The previous prime is 19189007. The next prime is 19189033. The reversal of 19189013 is 31098191.

19189013 = 3097² + 3098².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9597604 + 9591409 = 3098^2 + 3097^2 .

It is a cyclic number.

It is not a de Polignac number, because 19189013 - 2¹² = 19184917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19189033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9594506 + 9594507.

It is an arithmetic number, because the mean of its divisors is an integer number (9594507).

Almost surely, 2^19189013 is an apocalyptic number.

19189013 is the 3098-th centered square number.

It is an amenable number.

19189013 is a deficient number, since it is larger than the sum of its proper divisors (1).

19189013 is an equidigital number, since it uses as much as digits as its factorization.

19189013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 19189013 is about 4380.5265665214. The cubic root of 19189013 is about 267.7220934827.

The spelling of 19189013 in words is "nineteen million, one hundred eighty-nine thousand, thirteen".