74421943 has 2 divisors, whose sum is σ = 74421944. Its totient is φ = 74421942.

The previous prime is 74421901. The next prime is 74421953. The reversal of 74421943 is 34912447.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (34912447) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74421943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74421899 and 74421908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74421953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37210971 + 37210972.

It is an arithmetic number, because the mean of its divisors is an integer number (37210972).

Almost surely, 2^74421943 is an apocalyptic number.

74421943 is a deficient number, since it is larger than the sum of its proper divisors (1).

74421943 is an equidigital number, since it uses as much as digits as its factorization.

74421943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 34.

The square root of 74421943 is about 8626.8153451897. The cubic root of 74421943 is about 420.6300878993.

The spelling of 74421943 in words is "seventy-four million, four hundred twenty-one thousand, nine hundred forty-three".