640600619 has 2 divisors, whose sum is σ = 640600620. Its totient is φ = 640600618.

The previous prime is 640600607. The next prime is 640600621. The reversal of 640600619 is 916006046.

640600619 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 640600619 - 2²⁸ = 372165163 is a prime.

It is a super-2 number, since 2×640600619² = 820738306126366322, which contains 22 as substring.

Together with 640600621, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (640603619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320300309 + 320300310.

It is an arithmetic number, because the mean of its divisors is an integer number (320300310).

Almost surely, 2^640600619 is an apocalyptic number.

640600619 is a deficient number, since it is larger than the sum of its proper divisors (1).

640600619 is an equidigital number, since it uses as much as digits as its factorization.

640600619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 640600619 is about 25310.0892728572. The cubic root of 640600619 is about 862.0433738939.

The spelling of 640600619 in words is "six hundred forty million, six hundred thousand, six hundred nineteen".