19139513 has 2 divisors, whose sum is σ = 19139514. Its totient is φ = 19139512.

The previous prime is 19139489. The next prime is 19139521. The reversal of 19139513 is 31593191.

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., 19123129 + 16384 = 4373^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 19139513 - 2²⁰ = 18090937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19139513.

It is not a weakly prime, because it can be changed into another prime (19135513) 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, 9569756 + 9569757.

It is an arithmetic number, because the mean of its divisors is an integer number (9569757).

Almost surely, 2^19139513 is an apocalyptic number.

It is an amenable number.

19139513 is a deficient number, since it is larger than the sum of its proper divisors (1).

19139513 is an equidigital number, since it uses as much as digits as its factorization.

19139513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3645, while the sum is 32.

The square root of 19139513 is about 4374.8729124399. The cubic root of 19139513 is about 267.4916898458.

The spelling of 19139513 in words is "nineteen million, one hundred thirty-nine thousand, five hundred thirteen".