43401923 has 2 divisors, whose sum is σ = 43401924. Its totient is φ = 43401922.

The previous prime is 43401913. The next prime is 43401929. The reversal of 43401923 is 32910434.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43401923 - 2¹⁴ = 43385539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43401892 and 43401901.

It is not a weakly prime, because it can be changed into another prime (43401929) 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, 21700961 + 21700962.

It is an arithmetic number, because the mean of its divisors is an integer number (21700962).

Almost surely, 2^43401923 is an apocalyptic number.

43401923 is a deficient number, since it is larger than the sum of its proper divisors (1).

43401923 is an equidigital number, since it uses as much as digits as its factorization.

43401923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 43401923 is about 6588.0135852926. The cubic root of 43401923 is about 351.4279701619.

The spelling of 43401923 in words is "forty-three million, four hundred one thousand, nine hundred twenty-three".