43401373 has 2 divisors, whose sum is σ = 43401374. Its totient is φ = 43401372.

The previous prime is 43401359. The next prime is 43401401. The reversal of 43401373 is 37310434.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28323684 + 15077689 = 5322^2 + 3883^2 .

It is a cyclic number.

It is not a de Polignac number, because 43401373 - 2⁵ = 43401341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43401353) 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, 21700686 + 21700687.

It is an arithmetic number, because the mean of its divisors is an integer number (21700687).

Almost surely, 2^43401373 is an apocalyptic number.

It is an amenable number.

43401373 is a deficient number, since it is larger than the sum of its proper divisors (1).

43401373 is an equidigital number, since it uses as much as digits as its factorization.

43401373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 25.

The square root of 43401373 is about 6587.9718426842. The cubic root of 43401373 is about 351.4264856947.

The spelling of 43401373 in words is "forty-three million, four hundred one thousand, three hundred seventy-three".