9193000021 has 2 divisors, whose sum is σ = 9193000022. Its totient is φ = 9193000020.

The previous prime is 9193000007. The next prime is 9193000027. The reversal of 9193000021 is 1200003919.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7411315921 + 1781684100 = 86089^2 + 42210^2 .

It is a cyclic number.

It is not a de Polignac number, because 9193000021 - 2¹¹ = 9192997973 is a prime.

It is a super-2 number, since 2×9193000021² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9193000021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9193000027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4596500010 + 4596500011.

It is an arithmetic number, because the mean of its divisors is an integer number (4596500011).

Almost surely, 2^9193000021 is an apocalyptic number.

It is an amenable number.

9193000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

9193000021 is an equidigital number, since it uses as much as digits as its factorization.

9193000021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 9193000021 is about 95880.1336096274. The cubic root of 9193000021 is about 2094.8475363669.

The spelling of 9193000021 in words is "nine billion, one hundred ninety-three million, twenty-one", and thus it is an aban number.