619493387 has 2 divisors, whose sum is σ = 619493388. Its totient is φ = 619493386.

The previous prime is 619493383. The next prime is 619493449. The reversal of 619493387 is 783394916.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 619493387 - 2² = 619493383 is a prime.

It is not a weakly prime, because it can be changed into another prime (619493383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309746693 + 309746694.

It is an arithmetic number, because the mean of its divisors is an integer number (309746694).

Almost surely, 2^619493387 is an apocalyptic number.

619493387 is a deficient number, since it is larger than the sum of its proper divisors (1).

619493387 is an equidigital number, since it uses as much as digits as its factorization.

619493387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 50.

The square root of 619493387 is about 24889.6240831395. The cubic root of 619493387 is about 852.4695824236.

The spelling of 619493387 in words is "six hundred nineteen million, four hundred ninety-three thousand, three hundred eighty-seven".