396633181 has 4 divisors (see below), whose sum is σ = 453295072. Its totient is φ = 339971292.

The previous prime is 396633173. The next prime is 396633199. The reversal of 396633181 is 181336693.

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 a cyclic number.

It is not a de Polignac number, because 396633181 - 2³ = 396633173 is a prime.

It is a super-2 number, since 2×396633181² = 314635760540357522, 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 (396633101) 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, 28330935 + ... + 28330948.

It is an arithmetic number, because the mean of its divisors is an integer number (113323768).

Almost surely, 2^396633181 is an apocalyptic number.

It is an amenable number.

396633181 is a deficient number, since it is larger than the sum of its proper divisors (56661891).

396633181 is an equidigital number, since it uses as much as digits as its factorization.

396633181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56661890.

The product of its digits is 69984, while the sum is 40.

The square root of 396633181 is about 19915.6516589340. The cubic root of 396633181 is about 734.7332278803.

The spelling of 396633181 in words is "three hundred ninety-six million, six hundred thirty-three thousand, one hundred eighty-one".