43331457493 has 2 divisors, whose sum is σ = 43331457494. Its totient is φ = 43331457492.

The previous prime is 43331457479. The next prime is 43331457509. The reversal of 43331457493 is 39475413334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40871495889 + 2459961604 = 202167^2 + 49598^2 .

It is a cyclic number.

It is not a de Polignac number, because 43331457493 - 2⁵ = 43331457461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43331457293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21665728746 + 21665728747.

It is an arithmetic number, because the mean of its divisors is an integer number (21665728747).

Almost surely, 2^43331457493 is an apocalyptic number.

It is an amenable number.

43331457493 is a deficient number, since it is larger than the sum of its proper divisors (1).

43331457493 is an equidigital number, since it uses as much as digits as its factorization.

43331457493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 46.

The spelling of 43331457493 in words is "forty-three billion, three hundred thirty-one million, four hundred fifty-seven thousand, four hundred ninety-three".