385623977 has 2 divisors, whose sum is σ = 385623978. Its totient is φ = 385623976.

The previous prime is 385623961. The next prime is 385623989. The reversal of 385623977 is 779326583.

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., 370909081 + 14714896 = 19259^2 + 3836^2 .

It is a cyclic number.

It is not a de Polignac number, because 385623977 - 2⁴ = 385623961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (385628977) 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, 192811988 + 192811989.

It is an arithmetic number, because the mean of its divisors is an integer number (192811989).

Almost surely, 2^385623977 is an apocalyptic number.

It is an amenable number.

385623977 is a deficient number, since it is larger than the sum of its proper divisors (1).

385623977 is an equidigital number, since it uses as much as digits as its factorization.

385623977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 50.

The square root of 385623977 is about 19637.3108393181. The cubic root of 385623977 is about 727.8714356806.

The spelling of 385623977 in words is "three hundred eighty-five million, six hundred twenty-three thousand, nine hundred seventy-seven".