472639 has 2 divisors, whose sum is σ = 472640. Its totient is φ = 472638.

The previous prime is 472631. The next prime is 472643. The reversal of 472639 is 936274.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 472639 - 2³ = 472631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 472639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (472631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236319 + 236320.

It is an arithmetic number, because the mean of its divisors is an integer number (236320).

2⁴⁷²⁶³⁹ is an apocalyptic number.

472639 is a deficient number, since it is larger than the sum of its proper divisors (1).

472639 is an equidigital number, since it uses as much as digits as its factorization.

472639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 31.

The square root of 472639 is about 687.4874544310. The cubic root of 472639 is about 77.8950484158.

It can be divided in two parts, 472 and 639, that added together give a palindrome (1111).

The spelling of 472639 in words is "four hundred seventy-two thousand, six hundred thirty-nine".