961788089 has 2 divisors, whose sum is σ = 961788090. Its totient is φ = 961788088.

The previous prime is 961788071. The next prime is 961788167. The reversal of 961788089 is 980887169.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 542890000 + 418898089 = 23300^2 + 20467^2 .

It is a cyclic number.

It is not a de Polignac number, because 961788089 - 2²⁴ = 945010873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (961788019) 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, 480894044 + 480894045.

It is an arithmetic number, because the mean of its divisors is an integer number (480894045).

Almost surely, 2^961788089 is an apocalyptic number.

It is an amenable number.

961788089 is a deficient number, since it is larger than the sum of its proper divisors (1).

961788089 is an equidigital number, since it uses as much as digits as its factorization.

961788089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 56.

The square root of 961788089 is about 31012.7085079649. The cubic root of 961788089 is about 987.0969230128.

The spelling of 961788089 in words is "nine hundred sixty-one million, seven hundred eighty-eight thousand, eighty-nine".