389406907 has 4 divisors (see below), whose sum is σ = 399931456. Its totient is φ = 378882360.

The previous prime is 389406863. The next prime is 389406917. The reversal of 389406907 is 709604983.

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 389406907 - 2¹¹ = 389404859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389406917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5262219 + ... + 5262292.

It is an arithmetic number, because the mean of its divisors is an integer number (99982864).

Almost surely, 2^389406907 is an apocalyptic number.

389406907 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

389406907 is a deficient number, since it is larger than the sum of its proper divisors (10524549).

389406907 is a wasteful number, since it uses less digits than its factorization.

389406907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10524548.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 389406907 is about 19733.3957290680. The cubic root of 389406907 is about 730.2438085983.

The spelling of 389406907 in words is "three hundred eighty-nine million, four hundred six thousand, nine hundred seven".