9021912061 has 2 divisors, whose sum is σ = 9021912062. Its totient is φ = 9021912060.

The previous prime is 9021912023. The next prime is 9021912157. The reversal of 9021912061 is 1602191209.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9004112100 + 17799961 = 94890^2 + 4219^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9021912061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9021910061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4510956030 + 4510956031.

It is an arithmetic number, because the mean of its divisors is an integer number (4510956031).

Almost surely, 2^9021912061 is an apocalyptic number.

It is an amenable number.

9021912061 is a deficient number, since it is larger than the sum of its proper divisors (1).

9021912061 is an equidigital number, since it uses as much as digits as its factorization.

9021912061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 9021912061 is about 94983.7462990379. The cubic root of 9021912061 is about 2081.7705631866.

The spelling of 9021912061 in words is "nine billion, twenty-one million, nine hundred twelve thousand, sixty-one".