961380899 has 2 divisors, whose sum is σ = 961380900. Its totient is φ = 961380898.

The previous prime is 961380809. The next prime is 961380907. The reversal of 961380899 is 998083169.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 961380899 - 2²⁰ = 960332323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 961380899.

It is not a weakly prime, because it can be changed into another prime (961380809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480690449 + 480690450.

It is an arithmetic number, because the mean of its divisors is an integer number (480690450).

Almost surely, 2^961380899 is an apocalyptic number.

961380899 is a deficient number, since it is larger than the sum of its proper divisors (1).

961380899 is an equidigital number, since it uses as much as digits as its factorization.

961380899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 53.

The square root of 961380899 is about 31006.1429236208. The cubic root of 961380899 is about 986.9576017020.

The spelling of 961380899 in words is "nine hundred sixty-one million, three hundred eighty thousand, eight hundred ninety-nine".