619948019 has 2 divisors, whose sum is σ = 619948020. Its totient is φ = 619948018.

The previous prime is 619948009. The next prime is 619948033. The reversal of 619948019 is 910849916.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 619948019 - 2⁸ = 619947763 is a prime.

It is a super-2 number, since 2×619948019² = 768671092524048722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (619948009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309974009 + 309974010.

It is an arithmetic number, because the mean of its divisors is an integer number (309974010).

Almost surely, 2^619948019 is an apocalyptic number.

619948019 is a deficient number, since it is larger than the sum of its proper divisors (1).

619948019 is an equidigital number, since it uses as much as digits as its factorization.

619948019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 619948019 is about 24898.7553704999. The cubic root of 619948019 is about 852.6780673947.

The spelling of 619948019 in words is "six hundred nineteen million, nine hundred forty-eight thousand, nineteen".