376945561 has 2 divisors, whose sum is σ = 376945562. Its totient is φ = 376945560.

The previous prime is 376945559. The next prime is 376945609. The reversal of 376945561 is 165549673.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245705625 + 131239936 = 15675^2 + 11456^2 .

It is an emirp because it is prime and its reverse (165549673) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 376945561 - 2¹ = 376945559 is a prime.

Together with 376945559, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (376945511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 188472780 + 188472781.

It is an arithmetic number, because the mean of its divisors is an integer number (188472781).

Almost surely, 2^376945561 is an apocalyptic number.

It is an amenable number.

376945561 is a deficient number, since it is larger than the sum of its proper divisors (1).

376945561 is an equidigital number, since it uses as much as digits as its factorization.

376945561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 46.

The square root of 376945561 is about 19415.0859127638. The cubic root of 376945561 is about 722.3697388516.

The spelling of 376945561 in words is "three hundred seventy-six million, nine hundred forty-five thousand, five hundred sixty-one".