825856247 has 4 divisors (see below), whose sum is σ = 839394936. Its totient is φ = 812317560.

The previous prime is 825856231. The next prime is 825856301. The reversal of 825856247 is 742658528.

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

It is a cyclic number.

It is not a de Polignac number, because 825856247 - 2⁴ = 825856231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825856747) 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, 6769253 + ... + 6769374.

It is an arithmetic number, because the mean of its divisors is an integer number (209848734).

Almost surely, 2^825856247 is an apocalyptic number.

825856247 is a deficient number, since it is larger than the sum of its proper divisors (13538689).

825856247 is a wasteful number, since it uses less digits than its factorization.

825856247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13538688.

The product of its digits is 1075200, while the sum is 47.

The square root of 825856247 is about 28737.7147142914. The cubic root of 825856247 is about 938.2130859633.

The spelling of 825856247 in words is "eight hundred twenty-five million, eight hundred fifty-six thousand, two hundred forty-seven".