9121986733 has 2 divisors, whose sum is σ = 9121986734. Its totient is φ = 9121986732.

The previous prime is 9121986689. The next prime is 9121986739. The reversal of 9121986733 is 3376891219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8582725449 + 539261284 = 92643^2 + 23222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9121986733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9121986739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4560993366 + 4560993367.

It is an arithmetic number, because the mean of its divisors is an integer number (4560993367).

Almost surely, 2^9121986733 is an apocalyptic number.

It is an amenable number.

9121986733 is a deficient number, since it is larger than the sum of its proper divisors (1).

9121986733 is an equidigital number, since it uses as much as digits as its factorization.

9121986733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 49.

The square root of 9121986733 is about 95509.0924100947. The cubic root of 9121986733 is about 2089.4395552437.

The spelling of 9121986733 in words is "nine billion, one hundred twenty-one million, nine hundred eighty-six thousand, seven hundred thirty-three".