397281333 has 4 divisors (see below), whose sum is σ = 529708448. Its totient is φ = 264854220.

The previous prime is 397281331. The next prime is 397281373. The reversal of 397281333 is 333182793.

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 397281333 - 2¹ = 397281331 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 397281291 and 397281300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397281331) 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, 66213553 + ... + 66213558.

It is an arithmetic number, because the mean of its divisors is an integer number (132427112).

Almost surely, 2^397281333 is an apocalyptic number.

It is an amenable number.

397281333 is a deficient number, since it is larger than the sum of its proper divisors (132427115).

397281333 is a wasteful number, since it uses less digits than its factorization.

397281333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132427114.

The product of its digits is 81648, while the sum is 39.

The square root of 397281333 is about 19931.9174441397. The cubic root of 397281333 is about 735.1332277352.

The spelling of 397281333 in words is "three hundred ninety-seven million, two hundred eighty-one thousand, three hundred thirty-three".