472632891 has 4 divisors (see below), whose sum is σ = 630177192. Its totient is φ = 315088592.

The previous prime is 472632889. The next prime is 472632949. The reversal of 472632891 is 198236274.

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

It is a cyclic number.

It is not a de Polignac number, because 472632891 - 2¹ = 472632889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (472632091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78772146 + ... + 78772151.

It is an arithmetic number, because the mean of its divisors is an integer number (157544298).

Almost surely, 2^472632891 is an apocalyptic number.

472632891 is a deficient number, since it is larger than the sum of its proper divisors (157544301).

472632891 is a wasteful number, since it uses less digits than its factorization.

472632891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157544300.

The product of its digits is 145152, while the sum is 42.

The square root of 472632891 is about 21740.1216877919. The cubic root of 472632891 is about 778.9471280875.

The spelling of 472632891 in words is "four hundred seventy-two million, six hundred thirty-two thousand, eight hundred ninety-one".