389597693 has 4 divisors (see below), whose sum is σ = 389637180. Its totient is φ = 389558208.

The previous prime is 389597639. The next prime is 389597707. The reversal of 389597693 is 396795983.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 396795983 = 181 ⋅2192243.

It can be written as a sum of positive squares in 2 ways, for example, as 154803364 + 234794329 = 12442^2 + 15323^2 .

It is a cyclic number.

It is not a de Polignac number, because 389597693 - 2¹² = 389593597 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 (389597633) 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, 9221 + ... + 29397.

It is an arithmetic number, because the mean of its divisors is an integer number (97409295).

Almost surely, 2^389597693 is an apocalyptic number.

It is an amenable number.

389597693 is a deficient number, since it is larger than the sum of its proper divisors (39487).

389597693 is a wasteful number, since it uses less digits than its factorization.

389597693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39486.

The product of its digits is 11022480, while the sum is 59.

The square root of 389597693 is about 19738.2292265542. The cubic root of 389597693 is about 730.3630476651.

The spelling of 389597693 in words is "three hundred eighty-nine million, five hundred ninety-seven thousand, six hundred ninety-three".