387213089 has 4 divisors (see below), whose sum is σ = 387256320. Its totient is φ = 387169860.

The previous prime is 387213077. The next prime is 387213109. The reversal of 387213089 is 980312783.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 387213089 - 2¹² = 387208993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387213989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2609 + ... + 27950.

It is an arithmetic number, because the mean of its divisors is an integer number (96814080).

Almost surely, 2^387213089 is an apocalyptic number.

It is an amenable number.

387213089 is a deficient number, since it is larger than the sum of its proper divisors (43231).

387213089 is a wasteful number, since it uses less digits than its factorization.

387213089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43230.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 387213089 is about 19677.7307888893. The cubic root of 387213089 is about 728.8698902164.

It can be divided in two parts, 3872 and 13089, that added together give a palindrome (16961).

The spelling of 387213089 in words is "three hundred eighty-seven million, two hundred thirteen thousand, eighty-nine".