825406869 has 8 divisors (see below), whose sum is σ = 1257762880. Its totient is φ = 471661056.

The previous prime is 825406867. The next prime is 825406889. The reversal of 825406869 is 968604528.

It is a happy number.

825406869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 825406869 - 2¹ = 825406867 is a prime.

It is a super-2 number, since 2×825406869² = 1362592998784766322, 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 (825406861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19652524 + ... + 19652565.

It is an arithmetic number, because the mean of its divisors is an integer number (157220360).

Almost surely, 2^825406869 is an apocalyptic number.

It is an amenable number.

825406869 is a deficient number, since it is larger than the sum of its proper divisors (432356011).

825406869 is a wasteful number, since it uses less digits than its factorization.

825406869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39305099.

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 825406869 is about 28729.8950398361. The cubic root of 825406869 is about 938.0428832933.

The spelling of 825406869 in words is "eight hundred twenty-five million, four hundred six thousand, eight hundred sixty-nine".