43919057291 has 2 divisors, whose sum is σ = 43919057292. Its totient is φ = 43919057290.

The previous prime is 43919057257. The next prime is 43919057293. The reversal of 43919057291 is 19275091934.

43919057291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43919057291 is a prime.

Together with 43919057293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43919057293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21959528645 + 21959528646.

It is an arithmetic number, because the mean of its divisors is an integer number (21959528646).

Almost surely, 2^43919057291 is an apocalyptic number.

43919057291 is a deficient number, since it is larger than the sum of its proper divisors (1).

43919057291 is an equidigital number, since it uses as much as digits as its factorization.

43919057291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 50.

The spelling of 43919057291 in words is "forty-three billion, nine hundred nineteen million, fifty-seven thousand, two hundred ninety-one".