389306197 has 4 divisors (see below), whose sum is σ = 444921376. Its totient is φ = 333691020.

The previous prime is 389306191. The next prime is 389306201. The reversal of 389306197 is 791603983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389306197 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 (389306191) 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, 27807579 + ... + 27807592.

It is an arithmetic number, because the mean of its divisors is an integer number (111230344).

Almost surely, 2^389306197 is an apocalyptic number.

It is an amenable number.

389306197 is a deficient number, since it is larger than the sum of its proper divisors (55615179).

389306197 is an equidigital number, since it uses as much as digits as its factorization.

389306197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55615178.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 389306197 is about 19730.8437984796. The cubic root of 389306197 is about 730.1808502947.

The spelling of 389306197 in words is "three hundred eighty-nine million, three hundred six thousand, one hundred ninety-seven".