385373021 has 6 divisors (see below), whose sum is σ = 423591966. Its totient is φ = 350339000.

The previous prime is 385373003. The next prime is 385373057. The reversal of 385373021 is 120373583.

It can be written as a sum of positive squares in only one way, i.e., 368448025 + 16924996 = 19195^2 + 4114^2 .

It is not a de Polignac number, because 385373021 - 2²² = 381178717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385373081) 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 in 5 ways as a sum of consecutive naturals, for example, 1592330 + ... + 1592571.

It is an arithmetic number, because the mean of its divisors is an integer number (70598661).

Almost surely, 2^385373021 is an apocalyptic number.

It is an amenable number.

385373021 is a deficient number, since it is larger than the sum of its proper divisors (38218945).

385373021 is a wasteful number, since it uses less digits than its factorization.

385373021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3184923 (or 3184912 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 385373021 is about 19630.9200242882. The cubic root of 385373021 is about 727.7135069263.

The spelling of 385373021 in words is "three hundred eighty-five million, three hundred seventy-three thousand, twenty-one".