397193289 has 8 divisors (see below), whose sum is σ = 539583552. Its totient is φ = 259799280.

The previous prime is 397193257. The next prime is 397193299. The reversal of 397193289 is 982391793.

It is a happy number.

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

It is not a de Polignac number, because 397193289 - 2⁵ = 397193257 is a prime.

It is a super-3 number, since 3×397193289³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (397193239) 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, 1248877 + ... + 1249194.

It is an arithmetic number, because the mean of its divisors is an integer number (67447944).

Almost surely, 2^397193289 is an apocalyptic number.

It is an amenable number.

397193289 is a deficient number, since it is larger than the sum of its proper divisors (142390263).

397193289 is a wasteful number, since it uses less digits than its factorization.

397193289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2498127.

The product of its digits is 734832, while the sum is 51.

The square root of 397193289 is about 19929.7087033403. The cubic root of 397193289 is about 735.0789178995.

The spelling of 397193289 in words is "three hundred ninety-seven million, one hundred ninety-three thousand, two hundred eighty-nine".