385005553 has 2 divisors, whose sum is σ = 385005554. Its totient is φ = 385005552.

The previous prime is 385005547. The next prime is 385005557. The reversal of 385005553 is 355500583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 356190129 + 28815424 = 18873^2 + 5368^2 .

It is a cyclic number.

It is not a de Polignac number, because 385005553 - 2⁵ = 385005521 is a prime.

It is not a weakly prime, because it can be changed into another prime (385005557) 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, 192502776 + 192502777.

It is an arithmetic number, because the mean of its divisors is an integer number (192502777).

Almost surely, 2^385005553 is an apocalyptic number.

It is an amenable number.

385005553 is a deficient number, since it is larger than the sum of its proper divisors (1).

385005553 is an equidigital number, since it uses as much as digits as its factorization.

385005553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45000, while the sum is 34.

The square root of 385005553 is about 19621.5583733811. The cubic root of 385005553 is about 727.4821324284.

The spelling of 385005553 in words is "three hundred eighty-five million, five thousand, five hundred fifty-three".