43455897923 has 2 divisors, whose sum is σ = 43455897924. Its totient is φ = 43455897922.

The previous prime is 43455897917. The next prime is 43455897977. The reversal of 43455897923 is 32979855434.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43455897923 - 2⁴ = 43455897907 is a prime.

It is not a weakly prime, because it can be changed into another prime (43455897523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21727948961 + 21727948962.

It is an arithmetic number, because the mean of its divisors is an integer number (21727948962).

Almost surely, 2^43455897923 is an apocalyptic number.

43455897923 is a deficient number, since it is larger than the sum of its proper divisors (1).

43455897923 is an equidigital number, since it uses as much as digits as its factorization.

43455897923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32659200, while the sum is 59.

The spelling of 43455897923 in words is "forty-three billion, four hundred fifty-five million, eight hundred ninety-seven thousand, nine hundred twenty-three".