475639 has 2 divisors, whose sum is σ = 475640. Its totient is φ = 475638.

The previous prime is 475637. The next prime is 475649. The reversal of 475639 is 936574.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 475639 - 2¹ = 475637 is a prime.

Together with 475637, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (475637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237819 + 237820.

It is an arithmetic number, because the mean of its divisors is an integer number (237820).

2⁴⁷⁵⁶³⁹ is an apocalyptic number.

475639 is a deficient number, since it is larger than the sum of its proper divisors (1).

475639 is an equidigital number, since it uses as much as digits as its factorization.

475639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 34.

The square root of 475639 is about 689.6658611241. The cubic root of 475639 is about 78.0595097031.

The spelling of 475639 in words is "four hundred seventy-five thousand, six hundred thirty-nine".