43491154393 has 2 divisors, whose sum is σ = 43491154394. Its totient is φ = 43491154392.

The previous prime is 43491154373. The next prime is 43491154463. The reversal of 43491154393 is 39345119434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28882322704 + 14608831689 = 169948^2 + 120867^2 .

It is a cyclic number.

It is not a de Polignac number, because 43491154393 - 2⁵ = 43491154361 is a prime.

It is not a weakly prime, because it can be changed into another prime (43491154303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21745577196 + 21745577197.

It is an arithmetic number, because the mean of its divisors is an integer number (21745577197).

Almost surely, 2^43491154393 is an apocalyptic number.

It is an amenable number.

43491154393 is a deficient number, since it is larger than the sum of its proper divisors (1).

43491154393 is an equidigital number, since it uses as much as digits as its factorization.

43491154393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 46.

The spelling of 43491154393 in words is "forty-three billion, four hundred ninety-one million, one hundred fifty-four thousand, three hundred ninety-three".