919370161 has 2 divisors, whose sum is σ = 919370162. Its totient is φ = 919370160.

The previous prime is 919370159. The next prime is 919370189. The reversal of 919370161 is 161073919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 632271025 + 287099136 = 25145^2 + 16944^2 .

It is an emirp because it is prime and its reverse (161073919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 919370161 - 2¹ = 919370159 is a prime.

Together with 919370159, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 919370161.

It is not a weakly prime, because it can be changed into another prime (919370861) 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, 459685080 + 459685081.

It is an arithmetic number, because the mean of its divisors is an integer number (459685081).

Almost surely, 2^919370161 is an apocalyptic number.

It is an amenable number.

919370161 is a deficient number, since it is larger than the sum of its proper divisors (1).

919370161 is an equidigital number, since it uses as much as digits as its factorization.

919370161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 919370161 is about 30321.1174101483. The cubic root of 919370161 is about 972.3668283138.

The spelling of 919370161 in words is "nine hundred nineteen million, three hundred seventy thousand, one hundred sixty-one".