869543 has 2 divisors, whose sum is σ = 869544. Its totient is φ = 869542.

The previous prime is 869521. The next prime is 869551. The reversal of 869543 is 345968.

869543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 869543 - 2¹⁴ = 853159 is a prime.

It is a super-2 number, since 2×869543² = 1512210057698, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 869543.

It is not a weakly prime, because it can be changed into another prime (869563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434771 + 434772.

It is an arithmetic number, because the mean of its divisors is an integer number (434772).

2⁸⁶⁹⁵⁴³ is an apocalyptic number.

869543 is a deficient number, since it is larger than the sum of its proper divisors (1).

869543 is an equidigital number, since it uses as much as digits as its factorization.

869543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 869543 is about 932.4928954153. The cubic root of 869543 is about 95.4473088172.

The spelling of 869543 in words is "eight hundred sixty-nine thousand, five hundred forty-three".