43123434023 has 4 divisors (see below), whose sum is σ = 43221665520. Its totient is φ = 43025202528.

The previous prime is 43123434019. The next prime is 43123434049. The reversal of 43123434023 is 32043432134.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43123434023 - 2² = 43123434019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43123434083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49115090 + ... + 49115967.

It is an arithmetic number, because the mean of its divisors is an integer number (10805416380).

Almost surely, 2^43123434023 is an apocalyptic number.

43123434023 is a deficient number, since it is larger than the sum of its proper divisors (98231497).

43123434023 is an equidigital number, since it uses as much as digits as its factorization.

43123434023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98231496.

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 43123434023 its reverse (32043432134), we get a palindrome (75166866157).

The spelling of 43123434023 in words is "forty-three billion, one hundred twenty-three million, four hundred thirty-four thousand, twenty-three".