619316449 has 2 divisors, whose sum is σ = 619316450. Its totient is φ = 619316448.

The previous prime is 619316447. The next prime is 619316459. The reversal of 619316449 is 944613916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 584092224 + 35224225 = 24168^2 + 5935^2 .

It is a cyclic number.

It is not a de Polignac number, because 619316449 - 2¹ = 619316447 is a prime.

Together with 619316447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (619316441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309658224 + 309658225.

It is an arithmetic number, because the mean of its divisors is an integer number (309658225).

Almost surely, 2^619316449 is an apocalyptic number.

It is an amenable number.

619316449 is a deficient number, since it is larger than the sum of its proper divisors (1).

619316449 is an equidigital number, since it uses as much as digits as its factorization.

619316449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 619316449 is about 24886.0693762595. The cubic root of 619316449 is about 852.3884146884.

The spelling of 619316449 in words is "six hundred nineteen million, three hundred sixteen thousand, four hundred forty-nine".