1640497303 has 2 divisors, whose sum is σ = 1640497304. Its totient is φ = 1640497302.

The previous prime is 1640497283. The next prime is 1640497351. The reversal of 1640497303 is 3037940461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1640497303 - 2²¹ = 1638400151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1640467303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820248651 + 820248652.

It is an arithmetic number, because the mean of its divisors is an integer number (820248652).

Almost surely, 2^1640497303 is an apocalyptic number.

1640497303 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640497303 is an equidigital number, since it uses as much as digits as its factorization.

1640497303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 1640497303 is about 40503.0530083844. The cubic root of 1640497303 is about 1179.3928943935.

The spelling of 1640497303 in words is "one billion, six hundred forty million, four hundred ninety-seven thousand, three hundred three".