389603861 has 4 divisors (see below), whose sum is σ = 395418912. Its totient is φ = 383788812.

The previous prime is 389603849. The next prime is 389603867. The reversal of 389603861 is 168306983.

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 not a de Polignac number, because 389603861 - 2¹⁸ = 389341717 is a prime.

It is a super-2 number, since 2×389603861² = 303582337012214642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389603867) 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, 2907425 + ... + 2907558.

It is an arithmetic number, because the mean of its divisors is an integer number (98854728).

Almost surely, 2^389603861 is an apocalyptic number.

It is an amenable number.

389603861 is a deficient number, since it is larger than the sum of its proper divisors (5815051).

389603861 is an equidigital number, since it uses as much as digits as its factorization.

389603861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5815050.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 389603861 is about 19738.3854709548. The cubic root of 389603861 is about 730.3669019449.

The spelling of 389603861 in words is "three hundred eighty-nine million, six hundred three thousand, eight hundred sixty-one".