9042367921 has 2 divisors, whose sum is σ = 9042367922. Its totient is φ = 9042367920.

The previous prime is 9042367909. The next prime is 9042367963. The reversal of 9042367921 is 1297632409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8918913600 + 123454321 = 94440^2 + 11111^2 .

It is an emirp because it is prime and its reverse (1297632409) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9042367921 - 2⁷ = 9042367793 is a prime.

It is not a weakly prime, because it can be changed into another prime (9042362921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4521183960 + 4521183961.

It is an arithmetic number, because the mean of its divisors is an integer number (4521183961).

Almost surely, 2^9042367921 is an apocalyptic number.

It is an amenable number.

9042367921 is a deficient number, since it is larger than the sum of its proper divisors (1).

9042367921 is an equidigital number, since it uses as much as digits as its factorization.

9042367921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 9042367921 is about 95091.3661748531. The cubic root of 9042367921 is about 2083.3427451792.

The spelling of 9042367921 in words is "nine billion, forty-two million, three hundred sixty-seven thousand, nine hundred twenty-one".