865440469 has 4 divisors (see below), whose sum is σ = 883854144. Its totient is φ = 847026796.

The previous prime is 865440449. The next prime is 865440479. The reversal of 865440469 is 964044568.

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 not a de Polignac number, because 865440469 - 2⁹ = 865439957 is a prime.

It is a super-2 number, since 2×865440469² = 1497974410765879922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865440409) 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, 9206767 + ... + 9206860.

It is an arithmetic number, because the mean of its divisors is an integer number (220963536).

Almost surely, 2^865440469 is an apocalyptic number.

It is an amenable number.

865440469 is a deficient number, since it is larger than the sum of its proper divisors (18413675).

865440469 is a wasteful number, since it uses less digits than its factorization.

865440469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18413674.

The product of its (nonzero) digits is 829440, while the sum is 46.

The square root of 865440469 is about 29418.3695843260. The cubic root of 865440469 is about 952.9696433183.

The spelling of 865440469 in words is "eight hundred sixty-five million, four hundred forty thousand, four hundred sixty-nine".