43123007 has 2 divisors, whose sum is σ = 43123008. Its totient is φ = 43123006.

The previous prime is 43123001. The next prime is 43123037. The reversal of 43123007 is 70032134.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43123007 - 2²⁴ = 26345791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43123007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43123001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21561503 + 21561504.

It is an arithmetic number, because the mean of its divisors is an integer number (21561504).

Almost surely, 2^43123007 is an apocalyptic number.

43123007 is a deficient number, since it is larger than the sum of its proper divisors (1).

43123007 is an equidigital number, since it uses as much as digits as its factorization.

43123007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 43123007 is about 6566.8110221020. The cubic root of 43123007 is about 350.6735519418.

The spelling of 43123007 in words is "forty-three million, one hundred twenty-three thousand, seven".