919909783901 has 2 divisors, whose sum is σ = 919909783902. Its totient is φ = 919909783900.

The previous prime is 919909783817. The next prime is 919909783939. The reversal of 919909783901 is 109387909919.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 875536361401 + 44373422500 = 935701^2 + 210650^2 .

It is a cyclic number.

It is not a de Polignac number, because 919909783901 - 2³⁰ = 918836042077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (919909785901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459954891950 + 459954891951.

It is an arithmetic number, because the mean of its divisors is an integer number (459954891951).

Almost surely, 2^919909783901 is an apocalyptic number.

It is an amenable number.

919909783901 is a deficient number, since it is larger than the sum of its proper divisors (1).

919909783901 is an equidigital number, since it uses as much as digits as its factorization.

919909783901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9920232, while the sum is 65.

The spelling of 919909783901 in words is "nine hundred nineteen billion, nine hundred nine million, seven hundred eighty-three thousand, nine hundred one".