1501663 has 2 divisors, whose sum is σ = 1501664. Its totient is φ = 1501662.

The previous prime is 1501639. The next prime is 1501667. The reversal of 1501663 is 3661051.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1501663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1501667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 750831 + 750832.

It is an arithmetic number, because the mean of its divisors is an integer number (750832).

2^1501663 is an apocalyptic number.

1501663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1501663 is an equidigital number, since it uses as much as digits as its factorization.

1501663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1501663 is about 1225.4236002297. The cubic root of 1501663 is about 114.5137121822.

The spelling of 1501663 in words is "one million, five hundred one thousand, six hundred sixty-three".