43091197213 has 2 divisors, whose sum is σ = 43091197214. Its totient is φ = 43091197212.

The previous prime is 43091197181. The next prime is 43091197249. The reversal of 43091197213 is 31279119034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26432906724 + 16658290489 = 162582^2 + 129067^2 .

It is a cyclic number.

It is not a de Polignac number, because 43091197213 - 2⁵ = 43091197181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43091197273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21545598606 + 21545598607.

It is an arithmetic number, because the mean of its divisors is an integer number (21545598607).

Almost surely, 2^43091197213 is an apocalyptic number.

It is an amenable number.

43091197213 is a deficient number, since it is larger than the sum of its proper divisors (1).

43091197213 is an equidigital number, since it uses as much as digits as its factorization.

43091197213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 40.

The spelling of 43091197213 in words is "forty-three billion, ninety-one million, one hundred ninety-seven thousand, two hundred thirteen".