439690469 has 4 divisors (see below), whose sum is σ = 439734240. Its totient is φ = 439646700.

The previous prime is 439690463. The next prime is 439690487. The reversal of 439690469 is 964096934.

It is a happy number.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 439690469 - 2²⁸ = 171255013 is a prime.

It is a super-2 number, since 2×439690469² = 386655417058879922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439690463) 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, 1544 + ... + 29694.

It is an arithmetic number, because the mean of its divisors is an integer number (109933560).

Almost surely, 2^439690469 is an apocalyptic number.

It is an amenable number.

439690469 is a deficient number, since it is larger than the sum of its proper divisors (43771).

439690469 is a wasteful number, since it uses less digits than its factorization.

439690469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43770.

The product of its (nonzero) digits is 1259712, while the sum is 50.

The square root of 439690469 is about 20968.7975096332. The cubic root of 439690469 is about 760.4120970287.

The spelling of 439690469 in words is "four hundred thirty-nine million, six hundred ninety thousand, four hundred sixty-nine".