397684189 has 8 divisors (see below), whose sum is σ = 459182528. Its totient is φ = 337357440.

The previous prime is 397684181. The next prime is 397684207. The reversal of 397684189 is 981486793.

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

It is not a de Polignac number, because 397684189 - 2³ = 397684181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397684181) 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, 292167 + ... + 293524.

It is an arithmetic number, because the mean of its divisors is an integer number (57397816).

Almost surely, 2^397684189 is an apocalyptic number.

It is an amenable number.

397684189 is a deficient number, since it is larger than the sum of its proper divisors (61498339).

397684189 is an equidigital number, since it uses as much as digits as its factorization.

397684189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585795.

The product of its digits is 2612736, while the sum is 55.

The square root of 397684189 is about 19942.0206849757. The cubic root of 397684189 is about 735.3816266744.

The spelling of 397684189 in words is "three hundred ninety-seven million, six hundred eighty-four thousand, one hundred eighty-nine".