619490987 has 2 divisors, whose sum is σ = 619490988. Its totient is φ = 619490986.

The previous prime is 619490983. The next prime is 619491013. The reversal of 619490987 is 789094916.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 619490987 - 2² = 619490983 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (619490983) 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, 309745493 + 309745494.

It is an arithmetic number, because the mean of its divisors is an integer number (309745494).

Almost surely, 2^619490987 is an apocalyptic number.

619490987 is a deficient number, since it is larger than the sum of its proper divisors (1).

619490987 is an equidigital number, since it uses as much as digits as its factorization.

619490987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 619490987 is about 24889.5758702313. The cubic root of 619490987 is about 852.4684815619.

The spelling of 619490987 in words is "six hundred nineteen million, four hundred ninety thousand, nine hundred eighty-seven".