385003813 has 2 divisors, whose sum is σ = 385003814. Its totient is φ = 385003812.

The previous prime is 385003799. The next prime is 385003823. The reversal of 385003813 is 318300583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192848769 + 192155044 = 13887^2 + 13862^2 .

It is a cyclic number.

It is not a de Polignac number, because 385003813 - 2⁵ = 385003781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385003823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192501906 + 192501907.

It is an arithmetic number, because the mean of its divisors is an integer number (192501907).

Almost surely, 2^385003813 is an apocalyptic number.

It is an amenable number.

385003813 is a deficient number, since it is larger than the sum of its proper divisors (1).

385003813 is an equidigital number, since it uses as much as digits as its factorization.

385003813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 385003813 is about 19621.5140343451. The cubic root of 385003813 is about 727.4810364955.

The spelling of 385003813 in words is "three hundred eighty-five million, three thousand, eight hundred thirteen".