389665867231 has 4 divisors (see below), whose sum is σ = 389674793992. Its totient is φ = 389656940472.

The previous prime is 389665867223. The next prime is 389665867273. The reversal of 389665867231 is 132768566983.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 389665867231 - 2³ = 389665867223 is a prime.

It is a super-2 number, since 2×389665867231² (a number of 24 digits) 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 (389665867831) 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, 4397580 + ... + 4485313.

It is an arithmetic number, because the mean of its divisors is an integer number (97418698498).

Almost surely, 2^389665867231 is an apocalyptic number.

389665867231 is a deficient number, since it is larger than the sum of its proper divisors (8926761).

389665867231 is an equidigital number, since it uses as much as digits as its factorization.

389665867231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8926760.

The product of its digits is 78382080, while the sum is 64.

The spelling of 389665867231 in words is "three hundred eighty-nine billion, six hundred sixty-five million, eight hundred sixty-seven thousand, two hundred thirty-one".