802643 has 2 divisors, whose sum is σ = 802644. Its totient is φ = 802642.

The previous prime is 802609. The next prime is 802649. The reversal of 802643 is 346208.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 802643 - 2⁸ = 802387 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (802649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401321 + 401322.

It is an arithmetic number, because the mean of its divisors is an integer number (401322).

2⁸⁰²⁶⁴³ is an apocalyptic number.

802643 is a deficient number, since it is larger than the sum of its proper divisors (1).

802643 is an equidigital number, since it uses as much as digits as its factorization.

802643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 802643 is about 895.9034546200. The cubic root of 802643 is about 92.9338952906.

The spelling of 802643 in words is "eight hundred two thousand, six hundred forty-three".