43917872923 has 2 divisors, whose sum is σ = 43917872924. Its totient is φ = 43917872922.

The previous prime is 43917872903. The next prime is 43917872941. The reversal of 43917872923 is 32927871934.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43917872923 - 2⁵ = 43917872891 is a prime.

It is not a weakly prime, because it can be changed into another prime (43917872903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21958936461 + 21958936462.

It is an arithmetic number, because the mean of its divisors is an integer number (21958936462).

Almost surely, 2^43917872923 is an apocalyptic number.

43917872923 is a deficient number, since it is larger than the sum of its proper divisors (1).

43917872923 is an equidigital number, since it uses as much as digits as its factorization.

43917872923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 55.

The spelling of 43917872923 in words is "forty-three billion, nine hundred seventeen million, eight hundred seventy-two thousand, nine hundred twenty-three".