383275561 has 2 divisors, whose sum is σ = 383275562. Its totient is φ = 383275560.

The previous prime is 383275559. The next prime is 383275573. The reversal of 383275561 is 165572383.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 344288025 + 38987536 = 18555^2 + 6244^2 .

It is an emirp because it is prime and its reverse (165572383) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 383275561 - 2¹ = 383275559 is a prime.

Together with 383275559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (383275511) 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, 191637780 + 191637781.

It is an arithmetic number, because the mean of its divisors is an integer number (191637781).

Almost surely, 2^383275561 is an apocalyptic number.

It is an amenable number.

383275561 is a deficient number, since it is larger than the sum of its proper divisors (1).

383275561 is an equidigital number, since it uses as much as digits as its factorization.

383275561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 40.

The square root of 383275561 is about 19577.4247795771. The cubic root of 383275561 is about 726.3908684829.

The spelling of 383275561 in words is "three hundred eighty-three million, two hundred seventy-five thousand, five hundred sixty-one".