397135743321 has 8 divisors (see below), whose sum is σ = 534463056864. Its totient is φ = 262282796000.

The previous prime is 397135743317. The next prime is 397135743341. The reversal of 397135743321 is 123347531793.

It is a happy number.

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 397135743321 - 2² = 397135743317 is a prime.

It is a super-2 number, since 2×397135743321² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (397135743341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 618591180 + ... + 618591821.

It is an arithmetic number, because the mean of its divisors is an integer number (66807882108).

Almost surely, 2^397135743321 is an apocalyptic number.

It is an amenable number.

397135743321 is a deficient number, since it is larger than the sum of its proper divisors (137327313543).

397135743321 is a wasteful number, since it uses less digits than its factorization.

397135743321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237183111.

The product of its digits is 1428840, while the sum is 48.

The spelling of 397135743321 in words is "three hundred ninety-seven billion, one hundred thirty-five million, seven hundred forty-three thousand, three hundred twenty-one".