43454623139 has 2 divisors, whose sum is σ = 43454623140. Its totient is φ = 43454623138.

The previous prime is 43454623109. The next prime is 43454623141. The reversal of 43454623139 is 93132645434.

43454623139 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-43454623139 is a prime.

It is a Sophie Germain prime.

Together with 43454623141, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43454623139.

It is not a weakly prime, because it can be changed into another prime (43454623109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21727311569 + 21727311570.

It is an arithmetic number, because the mean of its divisors is an integer number (21727311570).

Almost surely, 2^43454623139 is an apocalyptic number.

43454623139 is a deficient number, since it is larger than the sum of its proper divisors (1).

43454623139 is an equidigital number, since it uses as much as digits as its factorization.

43454623139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 44.

The spelling of 43454623139 in words is "forty-three billion, four hundred fifty-four million, six hundred twenty-three thousand, one hundred thirty-nine".