472391 has 2 divisors, whose sum is σ = 472392. Its totient is φ = 472390.

The previous prime is 472369. The next prime is 472393. The reversal of 472391 is 193274.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 472391 - 2¹⁴ = 456007 is a prime.

Together with 472393, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₃₉₄₁₉ and since 472391 and 39419 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 472391.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 472391.

It is not a weakly prime, because it can be changed into another prime (472393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236195 + 236196.

It is an arithmetic number, because the mean of its divisors is an integer number (236196).

472391 is a Friedman number, since it can be written as 72*9^4-1^3, using all its digits and the basic arithmetic operations.

2⁴⁷²³⁹¹ is an apocalyptic number.

472391 is a deficient number, since it is larger than the sum of its proper divisors (1).

472391 is an equidigital number, since it uses as much as digits as its factorization.

472391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 26.

The square root of 472391 is about 687.3070638368. The cubic root of 472391 is about 77.8814218412.

The spelling of 472391 in words is "four hundred seventy-two thousand, three hundred ninety-one".