1640035223 has 2 divisors, whose sum is σ = 1640035224. Its totient is φ = 1640035222.

The previous prime is 1640035211. The next prime is 1640035247. The reversal of 1640035223 is 3225300461.

It is a weak prime.

It is an emirp because it is prime and its reverse (3225300461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1640035223 - 2⁴ = 1640035207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1640035192 and 1640035201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1640035123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820017611 + 820017612.

It is an arithmetic number, because the mean of its divisors is an integer number (820017612).

Almost surely, 2^1640035223 is an apocalyptic number.

1640035223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640035223 is an equidigital number, since it uses as much as digits as its factorization.

1640035223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 1640035223 is about 40497.3483452929. The cubic root of 1640035223 is about 1179.2821505267.

Adding to 1640035223 its reverse (3225300461), we get a palindrome (4865335684).

The spelling of 1640035223 in words is "one billion, six hundred forty million, thirty-five thousand, two hundred twenty-three".