623429 has 4 divisors (see below), whose sum is σ = 628320. Its totient is φ = 618540.

The previous prime is 623423. The next prime is 623431. The reversal of 623429 is 924326.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 623398 and 623407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2249 + ... + 2510.

It is an arithmetic number, because the mean of its divisors is an integer number (157080).

2⁶²³⁴²⁹ is an apocalyptic number.

It is an amenable number.

623429 is a deficient number, since it is larger than the sum of its proper divisors (4891).

623429 is a wasteful number, since it uses less digits than its factorization.

623429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4890.

The product of its digits is 2592, while the sum is 26.

The square root of 623429 is about 789.5752022449. The cubic root of 623429 is about 85.4271006356.

The spelling of 623429 in words is "six hundred twenty-three thousand, four hundred twenty-nine".