397634189 has 8 divisors (see below), whose sum is σ = 417674112. Its totient is φ = 377823600.

The previous prime is 397634183. The next prime is 397634203. The reversal of 397634189 is 981436793.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397634189 is a prime.

It is a super-2 number, since 2×397634189² = 316225896523375442, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397634183) 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, 53774 + ... + 60719.

It is an arithmetic number, because the mean of its divisors is an integer number (52209264).

Almost surely, 2^397634189 is an apocalyptic number.

It is an amenable number.

397634189 is a deficient number, since it is larger than the sum of its proper divisors (20039923).

397634189 is a wasteful number, since it uses less digits than its factorization.

397634189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114667.

The product of its digits is 979776, while the sum is 50.

The square root of 397634189 is about 19940.7670113263. The cubic root of 397634189 is about 735.3508060523.

The spelling of 397634189 in words is "three hundred ninety-seven million, six hundred thirty-four thousand, one hundred eighty-nine".