624469 has 2 divisors, whose sum is σ = 624470. Its totient is φ = 624468.

The previous prime is 624467. The next prime is 624479. The reversal of 624469 is 964426.

624469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 439569 + 184900 = 663^2 + 430^2 .

It is a cyclic number.

It is not a de Polignac number, because 624469 - 2¹ = 624467 is a prime.

It is a super-2 number, since 2×624469² = 779923063922, which contains 22 as substring.

Together with 624467, it forms a pair of twin primes.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 624469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (624467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312234 + 312235.

It is an arithmetic number, because the mean of its divisors is an integer number (312235).

2⁶²⁴⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

624469 is a deficient number, since it is larger than the sum of its proper divisors (1).

624469 is an equidigital number, since it uses as much as digits as its factorization.

624469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 31.

The square root of 624469 is about 790.2335097931. The cubic root of 624469 is about 85.4745772140.

The spelling of 624469 in words is "six hundred twenty-four thousand, four hundred sixty-nine".