19609013 has 2 divisors, whose sum is σ = 19609014. Its totient is φ = 19609012.

The previous prime is 19608977. The next prime is 19609027. The reversal of 19609013 is 31090691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12517444 + 7091569 = 3538^2 + 2663^2 .

It is a cyclic number.

It is not a de Polignac number, because 19609013 - 2¹⁰ = 19607989 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19609033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9804506 + 9804507.

It is an arithmetic number, because the mean of its divisors is an integer number (9804507).

Almost surely, 2^19609013 is an apocalyptic number.

It is an amenable number.

19609013 is a deficient number, since it is larger than the sum of its proper divisors (1).

19609013 is an equidigital number, since it uses as much as digits as its factorization.

19609013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 19609013 is about 4428.2065218325. The cubic root of 19609013 is about 269.6612716139.

The spelling of 19609013 in words is "nineteen million, six hundred nine thousand, thirteen".