397089509 has 8 divisors (see below), whose sum is σ = 410323200. Its totient is φ = 383882400.

The previous prime is 397089487. The next prime is 397089521. The reversal of 397089509 is 905980793.

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

It is a cyclic number.

It is not a de Polignac number, because 397089509 - 2¹² = 397085413 is a prime.

It is a super-2 number, since 2×397089509² = 315360156315722162, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397089599) 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 7 ways as a sum of consecutive naturals, for example, 26414 + ... + 38624.

It is an arithmetic number, because the mean of its divisors is an integer number (51290400).

Almost surely, 2^397089509 is an apocalyptic number.

It is an amenable number.

397089509 is a deficient number, since it is larger than the sum of its proper divisors (13233691).

397089509 is a wasteful number, since it uses less digits than its factorization.

397089509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13291.

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 397089509 is about 19927.1048825463. The cubic root of 397089509 is about 735.0148910245.

The spelling of 397089509 in words is "three hundred ninety-seven million, eighty-nine thousand, five hundred nine".