9913304021 has 2 divisors, whose sum is σ = 9913304022. Its totient is φ = 9913304020.

The previous prime is 9913304003. The next prime is 9913304033. The reversal of 9913304021 is 1204033199.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9392323396 + 520980625 = 96914^2 + 22825^2 .

It is a cyclic number.

It is not a de Polignac number, because 9913304021 - 2⁶ = 9913303957 is a prime.

It is a super-2 number, since 2×9913304021² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9913300021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4956652010 + 4956652011.

It is an arithmetic number, because the mean of its divisors is an integer number (4956652011).

Almost surely, 2^9913304021 is an apocalyptic number.

It is an amenable number.

9913304021 is a deficient number, since it is larger than the sum of its proper divisors (1).

9913304021 is an equidigital number, since it uses as much as digits as its factorization.

9913304021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 9913304021 is about 99565.5764860526. The cubic root of 9913304021 is about 2148.1905829954.

The spelling of 9913304021 in words is "nine billion, nine hundred thirteen million, three hundred four thousand, twenty-one".