389537391 has 8 divisors (see below), whose sum is σ = 519606064. Its totient is φ = 259580160.

The previous prime is 389537389. The next prime is 389537429. The reversal of 389537391 is 193735983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 389537391 - 2¹ = 389537389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 389537391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389537341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19330 + ... + 33951.

It is an arithmetic number, because the mean of its divisors is an integer number (64950758).

Almost surely, 2^389537391 is an apocalyptic number.

389537391 is a deficient number, since it is larger than the sum of its proper divisors (130068673).

389537391 is a wasteful number, since it uses less digits than its factorization.

389537391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55721.

The product of its digits is 612360, while the sum is 48.

The square root of 389537391 is about 19736.7016241316. The cubic root of 389537391 is about 730.3253638135.

The spelling of 389537391 in words is "three hundred eighty-nine million, five hundred thirty-seven thousand, three hundred ninety-one".