1673663 has 2 divisors, whose sum is σ = 1673664. Its totient is φ = 1673662.

The previous prime is 1673629. The next prime is 1673669. The reversal of 1673663 is 3663761.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1673663 - 2⁸ = 1673407 is a prime.

It is a super-2 number, since 2×1673663² = 5602295675138, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1673669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836831 + 836832.

It is an arithmetic number, because the mean of its divisors is an integer number (836832).

2^1673663 is an apocalyptic number.

1673663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1673663 is an equidigital number, since it uses as much as digits as its factorization.

1673663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 32.

The square root of 1673663 is about 1293.7012792759. The cubic root of 1673663 is about 118.7287799572.

The spelling of 1673663 in words is "one million, six hundred seventy-three thousand, six hundred sixty-three".