19397513 has 2 divisors, whose sum is σ = 19397514. Its totient is φ = 19397512.

The previous prime is 19397503. The next prime is 19397569. The reversal of 19397513 is 31579391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14235529 + 5161984 = 3773^2 + 2272^2 .

It is a cyclic number.

It is not a de Polignac number, because 19397513 - 2¹⁴ = 19381129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (19397503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9698756 + 9698757.

It is an arithmetic number, because the mean of its divisors is an integer number (9698757).

Almost surely, 2^19397513 is an apocalyptic number.

It is an amenable number.

19397513 is a deficient number, since it is larger than the sum of its proper divisors (1).

19397513 is an equidigital number, since it uses as much as digits as its factorization.

19397513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25515, while the sum is 38.

The square root of 19397513 is about 4404.2607779286. The cubic root of 19397513 is about 268.6882556551.

The spelling of 19397513 in words is "nineteen million, three hundred ninety-seven thousand, five hundred thirteen".