825828249 has 4 divisors (see below), whose sum is σ = 1101104336. Its totient is φ = 550552164.

The previous prime is 825828239. The next prime is 825828281. The reversal of 825828249 is 942828528.

It is a happy number.

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 825828249 - 2⁸ = 825827993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 825828198 and 825828207.

It is not an unprimeable number, because it can be changed into a prime (825828229) 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, 137638039 + ... + 137638044.

It is an arithmetic number, because the mean of its divisors is an integer number (275276084).

Almost surely, 2^825828249 is an apocalyptic number.

It is an amenable number.

825828249 is a deficient number, since it is larger than the sum of its proper divisors (275276087).

825828249 is a wasteful number, since it uses less digits than its factorization.

825828249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275276086.

The product of its digits is 737280, while the sum is 48.

The square root of 825828249 is about 28737.2275802660. The cubic root of 825828249 is about 938.2024834777.

The spelling of 825828249 in words is "eight hundred twenty-five million, eight hundred twenty-eight thousand, two hundred forty-nine".