1351663 has 2 divisors, whose sum is σ = 1351664. Its totient is φ = 1351662.

The previous prime is 1351639. The next prime is 1351667. The reversal of 1351663 is 3661531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1351663 - 2⁹ = 1351151 is a prime.

It is equal to p₁₀₃₆₆₉ and since 1351663 and 103669 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1351667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 675831 + 675832.

It is an arithmetic number, because the mean of its divisors is an integer number (675832).

2^1351663 is an apocalyptic number.

1351663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1351663 is an equidigital number, since it uses as much as digits as its factorization.

1351663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 25.

The square root of 1351663 is about 1162.6104248629. The cubic root of 1351663 is about 110.5663081476.

The spelling of 1351663 in words is "one million, three hundred fifty-one thousand, six hundred sixty-three".