9149805121 has 2 divisors, whose sum is σ = 9149805122. Its totient is φ = 9149805120.

The previous prime is 9149805103. The next prime is 9149805169. The reversal of 9149805121 is 1215089419.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7344490000 + 1805315121 = 85700^2 + 42489^2 .

It is a cyclic number.

It is not a de Polignac number, because 9149805121 - 2¹¹ = 9149803073 is a prime.

It is not a weakly prime, because it can be changed into another prime (9149805101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4574902560 + 4574902561.

It is an arithmetic number, because the mean of its divisors is an integer number (4574902561).

Almost surely, 2^9149805121 is an apocalyptic number.

It is an amenable number.

9149805121 is a deficient number, since it is larger than the sum of its proper divisors (1).

9149805121 is an equidigital number, since it uses as much as digits as its factorization.

9149805121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 9149805121 is about 95654.6136942699. The cubic root of 9149805121 is about 2091.5613830158.

The spelling of 9149805121 in words is "nine billion, one hundred forty-nine million, eight hundred five thousand, one hundred twenty-one".