13820843 has 2 divisors, whose sum is σ = 13820844. Its totient is φ = 13820842.

The previous prime is 13820819. The next prime is 13820857. The reversal of 13820843 is 34802831.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13820843 is a prime.

It is not a weakly prime, because it can be changed into another prime (13820743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6910421 + 6910422.

It is an arithmetic number, because the mean of its divisors is an integer number (6910422).

Almost surely, 2^13820843 is an apocalyptic number.

13820843 is a deficient number, since it is larger than the sum of its proper divisors (1).

13820843 is an equidigital number, since it uses as much as digits as its factorization.

13820843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 13820843 is about 3717.6394392141. The cubic root of 13820843 is about 239.9817289331.

The spelling of 13820843 in words is "thirteen million, eight hundred twenty thousand, eight hundred forty-three".