1663087843 has 2 divisors, whose sum is σ = 1663087844. Its totient is φ = 1663087842.

The previous prime is 1663087819. The next prime is 1663087861. The reversal of 1663087843 is 3487803661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1663087843 - 2¹³ = 1663079651 is a prime.

It is a super-2 number, since 2×1663087843² = 5531722347068785298, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1663087793 and 1663087802.

It is not a weakly prime, because it can be changed into another prime (1663087343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831543921 + 831543922.

It is an arithmetic number, because the mean of its divisors is an integer number (831543922).

Almost surely, 2^1663087843 is an apocalyptic number.

1663087843 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663087843 is an equidigital number, since it uses as much as digits as its factorization.

1663087843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 1663087843 is about 40780.9740320164. The cubic root of 1663087843 is about 1184.7818604203.

The spelling of 1663087843 in words is "one billion, six hundred sixty-three million, eighty-seven thousand, eight hundred forty-three".