402943 has 2 divisors, whose sum is σ = 402944. Its totient is φ = 402942.

The previous prime is 402923. The next prime is 402947. The reversal of 402943 is 349204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402943 is a prime.

It is a super-2 number, since 2×402943² = 324726122498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201471 + 201472.

It is an arithmetic number, because the mean of its divisors is an integer number (201472).

2⁴⁰²⁹⁴³ is an apocalyptic number.

402943 is a deficient number, since it is larger than the sum of its proper divisors (1).

402943 is an equidigital number, since it uses as much as digits as its factorization.

402943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 402943 is about 634.7779139195. Note that the first 3 decimals coincide. The cubic root of 402943 is about 73.8608903494.

The spelling of 402943 in words is "four hundred two thousand, nine hundred forty-three".