385575977 has 2 divisors, whose sum is σ = 385575978. Its totient is φ = 385575976.

The previous prime is 385575959. The next prime is 385575989. The reversal of 385575977 is 779575583.

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., 385572496 + 3481 = 19636^2 + 59^2 .

It is an emirp because it is prime and its reverse (779575583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 385575977 - 2⁶ = 385575913 is a prime.

It is not a weakly prime, because it can be changed into another prime (385575907) 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, 192787988 + 192787989.

It is an arithmetic number, because the mean of its divisors is an integer number (192787989).

Almost surely, 2^385575977 is an apocalyptic number.

It is an amenable number.

385575977 is a deficient number, since it is larger than the sum of its proper divisors (1).

385575977 is an equidigital number, since it uses as much as digits as its factorization.

385575977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9261000, while the sum is 56.

The square root of 385575977 is about 19636.0886380155. The cubic root of 385575977 is about 727.8412341711.

The spelling of 385575977 in words is "three hundred eighty-five million, five hundred seventy-five thousand, nine hundred seventy-seven".