1663267 has 2 divisors, whose sum is σ = 1663268. Its totient is φ = 1663266.

The previous prime is 1663223. The next prime is 1663273. The reversal of 1663267 is 7623661.

It is a strong prime.

It is an emirp because it is prime and its reverse (7623661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1663267 - 2¹⁹ = 1138979 is a prime.

It is a super-2 number, since 2×1663267² = 5532914226578, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1663217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831633 + 831634.

It is an arithmetic number, because the mean of its divisors is an integer number (831634).

2^1663267 is an apocalyptic number.

1663267 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663267 is an equidigital number, since it uses as much as digits as its factorization.

1663267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 31.

The square root of 1663267 is about 1289.6770913682. The cubic root of 1663267 is about 118.4824402639.

The spelling of 1663267 in words is "one million, six hundred sixty-three thousand, two hundred sixty-seven".