397297975329 has 32 divisors (see below), whose sum is σ = 640056119040. Its totient is φ = 242547561216.

The previous prime is 397297975313. The next prime is 397297975369. The reversal of 397297975329 is 923579792793.

397297975329 is a `hidden beast` number, since 3 + 9 + 7 + 297 + 9 + 7 + 5 + 329 = 666.

It is not a de Polignac number, because 397297975329 - 2⁴ = 397297975313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397297975369) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11679949 + ... + 11713914.

It is an arithmetic number, because the mean of its divisors is an integer number (20001753720).

Almost surely, 2^397297975329 is an apocalyptic number.

It is an amenable number.

397297975329 is a deficient number, since it is larger than the sum of its proper divisors (242758143711).

397297975329 is a wasteful number, since it uses less digits than its factorization.

397297975329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23393926 (or 23393920 counting only the distinct ones).

The product of its digits is 405076140, while the sum is 72.

The spelling of 397297975329 in words is "three hundred ninety-seven billion, two hundred ninety-seven million, nine hundred seventy-five thousand, three hundred twenty-nine".