640003027 has 2 divisors, whose sum is σ = 640003028. Its totient is φ = 640003026.

The previous prime is 640003019. The next prime is 640003057. The reversal of 640003027 is 720300046.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 640003027 - 2³ = 640003019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 640002989 and 640003007.

It is not a weakly prime, because it can be changed into another prime (640003057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320001513 + 320001514.

It is an arithmetic number, because the mean of its divisors is an integer number (320001514).

Almost surely, 2^640003027 is an apocalyptic number.

640003027 is a deficient number, since it is larger than the sum of its proper divisors (1).

640003027 is an equidigital number, since it uses as much as digits as its factorization.

640003027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 640003027 is about 25298.2811076168. The cubic root of 640003027 is about 861.7752346510.

The spelling of 640003027 in words is "six hundred forty million, three thousand, twenty-seven".