1663099 has 2 divisors, whose sum is σ = 1663100. Its totient is φ = 1663098.

The previous prime is 1663091. The next prime is 1663117. The reversal of 1663099 is 9903661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1663099 - 2³ = 1663091 is a prime.

1663099 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1663091) 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, 831549 + 831550.

It is an arithmetic number, because the mean of its divisors is an integer number (831550).

2^1663099 is an apocalyptic number.

1663099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663099 is an equidigital number, since it uses as much as digits as its factorization.

1663099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 1663099 is about 1289.6119571406. The cubic root of 1663099 is about 118.4784509826.

The spelling of 1663099 in words is "one million, six hundred sixty-three thousand, ninety-nine".