825458869 has 4 divisors (see below), whose sum is σ = 825599596. Its totient is φ = 825318144.

The previous prime is 825458861. The next prime is 825458873. The reversal of 825458869 is 968854528.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 528310225 + 297148644 = 22985^2 + 17238^2 .

It is a cyclic number.

It is not a de Polignac number, because 825458869 - 2³ = 825458861 is a prime.

It is a super-2 number, since 2×825458869² = 1362764688821518322, 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 (825458861) 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, 61164 + ... + 73429.

It is an arithmetic number, because the mean of its divisors is an integer number (206399899).

Almost surely, 2^825458869 is an apocalyptic number.

It is an amenable number.

825458869 is a deficient number, since it is larger than the sum of its proper divisors (140727).

825458869 is a wasteful number, since it uses less digits than its factorization.

825458869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140726.

The product of its digits is 5529600, while the sum is 55.

The square root of 825458869 is about 28730.8000062651. The cubic root of 825458869 is about 938.0625815405.

The spelling of 825458869 in words is "eight hundred twenty-five million, four hundred fifty-eight thousand, eight hundred sixty-nine".