843400027 has 2 divisors, whose sum is σ = 843400028. Its totient is φ = 843400026.

The previous prime is 843400013. The next prime is 843400057. The reversal of 843400027 is 720004348.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-843400027 is a prime.

It is a super-2 number, since 2×843400027² = 1422647211087201458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 843399968 and 843400004.

It is not a weakly prime, because it can be changed into another prime (843400057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421700013 + 421700014.

It is an arithmetic number, because the mean of its divisors is an integer number (421700014).

Almost surely, 2^843400027 is an apocalyptic number.

843400027 is a deficient number, since it is larger than the sum of its proper divisors (1).

843400027 is an equidigital number, since it uses as much as digits as its factorization.

843400027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 843400027 is about 29041.3502957421. The cubic root of 843400027 is about 944.8101209535.

The spelling of 843400027 in words is "eight hundred forty-three million, four hundred thousand, twenty-seven".