439087969 has 4 divisors (see below), whose sum is σ = 439288596. Its totient is φ = 438887344.

The previous prime is 439087949. The next prime is 439087973. The reversal of 439087969 is 969780934.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 969780934 = 2 ⋅484890467.

It can be written as a sum of positive squares in 2 ways, for example, as 333245025 + 105842944 = 18255^2 + 10288^2 .

It is a cyclic number.

It is not a de Polignac number, because 439087969 - 2¹¹ = 439085921 is a prime.

It is a super-2 number, since 2×439087969² = 385596489041089922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (439087939) 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, 96994 + ... + 101419.

It is an arithmetic number, because the mean of its divisors is an integer number (109822149).

Almost surely, 2^439087969 is an apocalyptic number.

It is an amenable number.

439087969 is a deficient number, since it is larger than the sum of its proper divisors (200627).

439087969 is a wasteful number, since it uses less digits than its factorization.

439087969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200626.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The square root of 439087969 is about 20954.4260002511. The cubic root of 439087969 is about 760.0646118891.

The spelling of 439087969 in words is "four hundred thirty-nine million, eighty-seven thousand, nine hundred sixty-nine".