43400111 has 2 divisors, whose sum is σ = 43400112. Its totient is φ = 43400110.

The previous prime is 43400107. The next prime is 43400131. The reversal of 43400111 is 11100434.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43400111 - 2² = 43400107 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43400101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21700055 + 21700056.

It is an arithmetic number, because the mean of its divisors is an integer number (21700056).

Almost surely, 2^43400111 is an apocalyptic number.

43400111 is a deficient number, since it is larger than the sum of its proper divisors (1).

43400111 is an equidigital number, since it uses as much as digits as its factorization.

43400111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 43400111 is about 6587.8760613721. The cubic root of 43400111 is about 351.4230794697.

Adding to 43400111 its reverse (11100434), we get a palindrome (54500545).

The spelling of 43400111 in words is "forty-three million, four hundred thousand, one hundred eleven".