43103203993 has 2 divisors, whose sum is σ = 43103203994. Its totient is φ = 43103203992.

The previous prime is 43103203951. The next prime is 43103204033. The reversal of 43103203993 is 39930230134.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30526030089 + 12577173904 = 174717^2 + 112148^2 .

It is a cyclic number.

It is not a de Polignac number, because 43103203993 - 2²⁵ = 43069649561 is a prime.

It is a super-2 number, since 2×43103203993² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43103209993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21551601996 + 21551601997.

It is an arithmetic number, because the mean of its divisors is an integer number (21551601997).

Almost surely, 2^43103203993 is an apocalyptic number.

It is an amenable number.

43103203993 is a deficient number, since it is larger than the sum of its proper divisors (1).

43103203993 is an equidigital number, since it uses as much as digits as its factorization.

43103203993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 37.

The spelling of 43103203993 in words is "forty-three billion, one hundred three million, two hundred three thousand, nine hundred ninety-three".