8951921749 has 2 divisors, whose sum is σ = 8951921750. Its totient is φ = 8951921748.

The previous prime is 8951921731. The next prime is 8951921773. The reversal of 8951921749 is 9471291598.

8951921749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8191155025 + 760766724 = 90505^2 + 27582^2 .

It is a cyclic number.

It is not a de Polignac number, because 8951921749 - 2²⁵ = 8918367317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8951921749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8951921779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4475960874 + 4475960875.

It is an arithmetic number, because the mean of its divisors is an integer number (4475960875).

Almost surely, 2^8951921749 is an apocalyptic number.

It is an amenable number.

8951921749 is a deficient number, since it is larger than the sum of its proper divisors (1).

8951921749 is an equidigital number, since it uses as much as digits as its factorization.

8951921749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 55.

The square root of 8951921749 is about 94614.5958560306. The cubic root of 8951921749 is about 2076.3732525989.

The spelling of 8951921749 in words is "eight billion, nine hundred fifty-one million, nine hundred twenty-one thousand, seven hundred forty-nine".