1640427703 has 2 divisors, whose sum is σ = 1640427704. Its totient is φ = 1640427702.

The previous prime is 1640427637. The next prime is 1640427707. The reversal of 1640427703 is 3077240461.

It is a strong prime.

It is an emirp because it is prime and its reverse (3077240461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1640427703 - 2²⁹ = 1103556791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1640427707) 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, 820213851 + 820213852.

It is an arithmetic number, because the mean of its divisors is an integer number (820213852).

Almost surely, 2^1640427703 is an apocalyptic number.

1640427703 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640427703 is an equidigital number, since it uses as much as digits as its factorization.

1640427703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 1640427703 is about 40502.1938047805. The cubic root of 1640427703 is about 1179.3762151206.

The spelling of 1640427703 in words is "one billion, six hundred forty million, four hundred twenty-seven thousand, seven hundred three".