397631533 has 8 divisors (see below), whose sum is σ = 434610848. Its totient is φ = 361565424.

The previous prime is 397631501. The next prime is 397631537. The reversal of 397631533 is 335136793.

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 397631533 - 2⁵ = 397631501 is a prime.

It is a super-2 number, since 2×397631533² = 316221672071860178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397631537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227391 + ... + 229132.

It is an arithmetic number, because the mean of its divisors is an integer number (54326356).

Almost surely, 2^397631533 is an apocalyptic number.

It is an amenable number.

397631533 is a deficient number, since it is larger than the sum of its proper divisors (36979315).

397631533 is a wasteful number, since it uses less digits than its factorization.

397631533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456603.

The product of its digits is 153090, while the sum is 40.

The square root of 397631533 is about 19940.7004139774. The cubic root of 397631533 is about 735.3491687885.

The spelling of 397631533 in words is "three hundred ninety-seven million, six hundred thirty-one thousand, five hundred thirty-three".