8969991461 has 2 divisors, whose sum is σ = 8969991462. Its totient is φ = 8969991460.

The previous prime is 8969991449. The next prime is 8969991463. The reversal of 8969991461 is 1641999698.

It is a happy number.

8969991461 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8250088900 + 719902561 = 90830^2 + 26831^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8969991461 is a prime.

It is a Sophie Germain prime.

Together with 8969991463, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8969991394 and 8969991403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8969991463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4484995730 + 4484995731.

It is an arithmetic number, because the mean of its divisors is an integer number (4484995731).

Almost surely, 2^8969991461 is an apocalyptic number.

It is an amenable number.

8969991461 is a deficient number, since it is larger than the sum of its proper divisors (1).

8969991461 is an equidigital number, since it uses as much as digits as its factorization.

8969991461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7558272, while the sum is 62.

The square root of 8969991461 is about 94710.0388607248. The cubic root of 8969991461 is about 2077.7693867213.

The spelling of 8969991461 in words is "eight billion, nine hundred sixty-nine million, nine hundred ninety-one thousand, four hundred sixty-one".