397838449 has 4 divisors (see below), whose sum is σ = 397997680. Its totient is φ = 397679220.

The previous prime is 397838431. The next prime is 397838453. The reversal of 397838449 is 944838793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 944838793 = 13183 ⋅71671.

It is a cyclic number.

It is not a de Polignac number, because 397838449 - 2⁵ = 397838417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397838449.

It is not an unprimeable number, because it can be changed into a prime (397838459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75807 + ... + 80884.

It is an arithmetic number, because the mean of its divisors is an integer number (99499420).

Almost surely, 2^397838449 is an apocalyptic number.

It is an amenable number.

397838449 is a deficient number, since it is larger than the sum of its proper divisors (159231).

397838449 is a wasteful number, since it uses less digits than its factorization.

397838449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159230.

The product of its digits is 5225472, while the sum is 55.

The square root of 397838449 is about 19945.8880223469. Note that the first 3 decimals coincide. The cubic root of 397838449 is about 735.4766981813.

The spelling of 397838449 in words is "three hundred ninety-seven million, eight hundred thirty-eight thousand, four hundred forty-nine".