397031399 has 8 divisors (see below), whose sum is σ = 401681280. Its totient is φ = 392407416.

The previous prime is 397031381. The next prime is 397031407. The reversal of 397031399 is 993130793.

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 397031399 - 2²⁴ = 380254183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397031309) 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, 25262 + ... + 37844.

It is an arithmetic number, because the mean of its divisors is an integer number (50210160).

Almost surely, 2^397031399 is an apocalyptic number.

397031399 is a deficient number, since it is larger than the sum of its proper divisors (4649881).

397031399 is a wasteful number, since it uses less digits than its factorization.

397031399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12949.

The product of its (nonzero) digits is 137781, while the sum is 44.

The square root of 397031399 is about 19925.6467649108. The cubic root of 397031399 is about 734.9790352976.

The spelling of 397031399 in words is "three hundred ninety-seven million, thirty-one thousand, three hundred ninety-nine".