904429 has 4 divisors (see below), whose sum is σ = 943776. Its totient is φ = 865084.

The previous prime is 904399. The next prime is 904441. The reversal of 904429 is 924409.

904429 = T₇₇₅ + T₇₇₆ + T₇₇₇.

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, and also an emirpimes, since its reverse is a distinct semiprime: 924409 = 17 ⋅54377.

It is a cyclic number.

It is not a de Polignac number, because 904429 - 2¹⁹ = 380141 is a prime.

It is a super-4 number, since 4×904429⁴ (a number of 25 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 904397 and 904406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (904459) 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 in 3 ways as a sum of consecutive naturals, for example, 19639 + ... + 19684.

It is an arithmetic number, because the mean of its divisors is an integer number (235944).

2⁹⁰⁴⁴²⁹ is an apocalyptic number.

904429 is the 777-th centered triangular number.

It is an amenable number.

904429 is a deficient number, since it is larger than the sum of its proper divisors (39347).

904429 is a wasteful number, since it uses less digits than its factorization.

904429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39346.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 904429 is about 951.0147212320. The cubic root of 904429 is about 96.7070553911.

Subtracting from 904429 its sum of digits (28), we obtain a square (904401 = 951²).

The spelling of 904429 in words is "nine hundred four thousand, four hundred twenty-nine".