640003019 has 2 divisors, whose sum is σ = 640003020. Its totient is φ = 640003018.

The previous prime is 640003009. The next prime is 640003027. The reversal of 640003019 is 910300046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 640003019 - 2⁴ = 640003003 is a prime.

It is a super-2 number, since 2×640003019² = 819207728658228722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 640002985 and 640003003.

It is not a weakly prime, because it can be changed into another prime (640003009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320001509 + 320001510.

It is an arithmetic number, because the mean of its divisors is an integer number (320001510).

Almost surely, 2^640003019 is an apocalyptic number.

640003019 is a deficient number, since it is larger than the sum of its proper divisors (1).

640003019 is an equidigital number, since it uses as much as digits as its factorization.

640003019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 640003019 is about 25298.2809495033. The cubic root of 640003019 is about 861.7752310603.

The spelling of 640003019 in words is "six hundred forty million, three thousand, nineteen".