13900043 has 2 divisors, whose sum is σ = 13900044. Its totient is φ = 13900042.

The previous prime is 13900013. The next prime is 13900063. The reversal of 13900043 is 34000931.

It is an a-pointer prime, because the next prime (13900063) can be obtained adding 13900043 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13900043 - 2⁶ = 13899979 is a prime.

It is a super-2 number, since 2×13900043² = 386422390803698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13899988 and 13900024.

It is not a weakly prime, because it can be changed into another prime (13900013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6950021 + 6950022.

It is an arithmetic number, because the mean of its divisors is an integer number (6950022).

Almost surely, 2^13900043 is an apocalyptic number.

13900043 is a deficient number, since it is larger than the sum of its proper divisors (1).

13900043 is an equidigital number, since it uses as much as digits as its factorization.

13900043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 13900043 is about 3728.2761432061. The cubic root of 13900043 is about 240.4392592142.

Adding to 13900043 its reverse (34000931), we get a palindrome (47900974).

The spelling of 13900043 in words is "thirteen million, nine hundred thousand, forty-three".