825969 has 4 divisors (see below), whose sum is σ = 1101296. Its totient is φ = 550644.

The previous prime is 825961. The next prime is 825971. The reversal of 825969 is 969528.

It is a happy number.

825969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 825969 - 2³ = 825961 is a prime.

It is a super-2 number, since 2×825969² = 1364449577922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 825969.

It is not an unprimeable number, because it can be changed into a prime (825961) 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, 137659 + ... + 137664.

It is an arithmetic number, because the mean of its divisors is an integer number (275324).

2⁸²⁵⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

825969 is a deficient number, since it is larger than the sum of its proper divisors (275327).

825969 is a wasteful number, since it uses less digits than its factorization.

825969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275326.

The product of its digits is 38880, while the sum is 39.

The square root of 825969 is about 908.8283666348. The cubic root of 825969 is about 93.8255781661.

The spelling of 825969 in words is "eight hundred twenty-five thousand, nine hundred sixty-nine".