1662863 has 2 divisors, whose sum is σ = 1662864. Its totient is φ = 1662862.

The previous prime is 1662851. The next prime is 1662883. The reversal of 1662863 is 3682661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1662863 - 2¹⁰ = 1661839 is a prime.

It is a super-2 number, since 2×1662863² = 5530226713538, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1662803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831431 + 831432.

It is an arithmetic number, because the mean of its divisors is an integer number (831432).

2^1662863 is an apocalyptic number.

1662863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662863 is an equidigital number, since it uses as much as digits as its factorization.

1662863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 1662863 is about 1289.5204535020. The cubic root of 1662863 is about 118.4728465383.

The spelling of 1662863 in words is "one million, six hundred sixty-two thousand, eight hundred sixty-three".