619396913 has 2 divisors, whose sum is σ = 619396914. Its totient is φ = 619396912.

The previous prime is 619396889. The next prime is 619396933. The reversal of 619396913 is 319693916.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 571066609 + 48330304 = 23897^2 + 6952^2 .

It is a cyclic number.

It is not a de Polignac number, because 619396913 - 2²⁰ = 618348337 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (619396933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309698456 + 309698457.

It is an arithmetic number, because the mean of its divisors is an integer number (309698457).

Almost surely, 2^619396913 is an apocalyptic number.

It is an amenable number.

619396913 is a deficient number, since it is larger than the sum of its proper divisors (1).

619396913 is an equidigital number, since it uses as much as digits as its factorization.

619396913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 236196, while the sum is 47.

The square root of 619396913 is about 24887.6859711786. The cubic root of 619396913 is about 852.4253282950.

The spelling of 619396913 in words is "six hundred nineteen million, three hundred ninety-six thousand, nine hundred thirteen".