397137833 has 4 divisors (see below), whose sum is σ = 420498900. Its totient is φ = 373776768.

The previous prime is 397137823. The next prime is 397137841. The reversal of 397137833 is 338731793.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 287370304 + 109767529 = 16952^2 + 10477^2 .

It is a cyclic number.

It is not a de Polignac number, because 397137833 - 2¹⁰ = 397136809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397137823) 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 3 ways as a sum of consecutive naturals, for example, 11680508 + ... + 11680541.

It is an arithmetic number, because the mean of its divisors is an integer number (105124725).

Almost surely, 2^397137833 is an apocalyptic number.

It is an amenable number.

397137833 is a deficient number, since it is larger than the sum of its proper divisors (23361067).

397137833 is a wasteful number, since it uses less digits than its factorization.

397137833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23361066.

The product of its digits is 285768, while the sum is 44.

The square root of 397137833 is about 19928.3173649960. The cubic root of 397137833 is about 735.0447058127.

The spelling of 397137833 in words is "three hundred ninety-seven million, one hundred thirty-seven thousand, eight hundred thirty-three".