43411993 has 2 divisors, whose sum is σ = 43411994. Its totient is φ = 43411992.

The previous prime is 43411957. The next prime is 43412021. The reversal of 43411993 is 39911434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37785609 + 5626384 = 6147^2 + 2372^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43411993 is a prime.

It is a super-2 number, since 2×43411993² = 3769202272464098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43411943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21705996 + 21705997.

It is an arithmetic number, because the mean of its divisors is an integer number (21705997).

Almost surely, 2^43411993 is an apocalyptic number.

It is an amenable number.

43411993 is a deficient number, since it is larger than the sum of its proper divisors (1).

43411993 is an equidigital number, since it uses as much as digits as its factorization.

43411993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 34.

The square root of 43411993 is about 6588.7778077577. Note that the first 3 decimals coincide. The cubic root of 43411993 is about 351.4551471912.

The spelling of 43411993 in words is "forty-three million, four hundred eleven thousand, nine hundred ninety-three".