385997593 has 4 divisors (see below), whose sum is σ = 386295588. Its totient is φ = 385699600.

The previous prime is 385997587. The next prime is 385997609. The reversal of 385997593 is 395799583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 395799583 = 19 ⋅20831557.

It can be written as a sum of positive squares in 2 ways, for example, as 2347024 + 383650569 = 1532^2 + 19587^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385997593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385997533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147046 + ... + 149647.

It is an arithmetic number, because the mean of its divisors is an integer number (96573897).

Almost surely, 2^385997593 is an apocalyptic number.

It is an amenable number.

385997593 is a deficient number, since it is larger than the sum of its proper divisors (297995).

385997593 is a wasteful number, since it uses less digits than its factorization.

385997593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297994.

The product of its digits is 9185400, while the sum is 58.

The square root of 385997593 is about 19646.8214477559. The cubic root of 385997593 is about 728.1064285340.

The spelling of 385997593 in words is "three hundred eighty-five million, nine hundred ninety-seven thousand, five hundred ninety-three".