9020373721 has 2 divisors, whose sum is σ = 9020373722. Its totient is φ = 9020373720.

The previous prime is 9020373697. The next prime is 9020373727. The reversal of 9020373721 is 1273730209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5515141696 + 3505232025 = 74264^2 + 59205^2 .

It is a cyclic number.

It is not a de Polignac number, because 9020373721 - 2⁹ = 9020373209 is a prime.

It is not a weakly prime, because it can be changed into another prime (9020373727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4510186860 + 4510186861.

It is an arithmetic number, because the mean of its divisors is an integer number (4510186861).

Almost surely, 2^9020373721 is an apocalyptic number.

It is an amenable number.

9020373721 is a deficient number, since it is larger than the sum of its proper divisors (1).

9020373721 is an equidigital number, since it uses as much as digits as its factorization.

9020373721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 9020373721 is about 94975.6480420113. The cubic root of 9020373721 is about 2081.6522345018.

The spelling of 9020373721 in words is "nine billion, twenty million, three hundred seventy-three thousand, seven hundred twenty-one".