397969833 has 4 divisors (see below), whose sum is σ = 530626448. Its totient is φ = 265313220.

The previous prime is 397969829. The next prime is 397969849. The reversal of 397969833 is 338969793.

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.

It is not a de Polignac number, because 397969833 - 2² = 397969829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (397969823) 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, 66328303 + ... + 66328308.

It is an arithmetic number, because the mean of its divisors is an integer number (132656612).

Almost surely, 2^397969833 is an apocalyptic number.

It is an amenable number.

397969833 is a deficient number, since it is larger than the sum of its proper divisors (132656615).

397969833 is a wasteful number, since it uses less digits than its factorization.

397969833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132656614.

The product of its digits is 6613488, while the sum is 57.

The square root of 397969833 is about 19949.1812613952. The cubic root of 397969833 is about 735.5576516734.

The spelling of 397969833 in words is "three hundred ninety-seven million, nine hundred sixty-nine thousand, eight hundred thirty-three".