385661597 has 2 divisors, whose sum is σ = 385661598. Its totient is φ = 385661596.

The previous prime is 385661567. The next prime is 385661599. The reversal of 385661597 is 795166583.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 381577156 + 4084441 = 19534^2 + 2021^2 .

It is an emirp because it is prime and its reverse (795166583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 385661597 - 2⁶ = 385661533 is a prime.

Together with 385661599, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385661599) 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, 192830798 + 192830799.

It is an arithmetic number, because the mean of its divisors is an integer number (192830799).

Almost surely, 2^385661597 is an apocalyptic number.

It is an amenable number.

385661597 is a deficient number, since it is larger than the sum of its proper divisors (1).

385661597 is an equidigital number, since it uses as much as digits as its factorization.

385661597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 50.

The square root of 385661597 is about 19638.2686864194. The cubic root of 385661597 is about 727.8951043619.

The spelling of 385661597 in words is "three hundred eighty-five million, six hundred sixty-one thousand, five hundred ninety-seven".