1664028103 has 2 divisors, whose sum is σ = 1664028104. Its totient is φ = 1664028102.

The previous prime is 1664028101. The next prime is 1664028209. The reversal of 1664028103 is 3018204661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1664028103 - 2¹ = 1664028101 is a prime.

Together with 1664028101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1664028101) 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, 832014051 + 832014052.

It is an arithmetic number, because the mean of its divisors is an integer number (832014052).

Almost surely, 2^1664028103 is an apocalyptic number.

1664028103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664028103 is an equidigital number, since it uses as much as digits as its factorization.

1664028103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 1664028103 is about 40792.5005730220. The cubic root of 1664028103 is about 1185.0050984013.

The spelling of 1664028103 in words is "one billion, six hundred sixty-four million, twenty-eight thousand, one hundred three".