825849859 has 4 divisors (see below), whose sum is σ = 827634016. Its totient is φ = 824065704.

The previous prime is 825849853. The next prime is 825849887. The reversal of 825849859 is 958948528.

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 825849859 - 2²¹ = 823752707 is a prime.

It is a super-2 number, since 2×825849859² = 1364055979220639762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825849853) 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, 891384 + ... + 892309.

It is an arithmetic number, because the mean of its divisors is an integer number (206908504).

Almost surely, 2^825849859 is an apocalyptic number.

825849859 is a deficient number, since it is larger than the sum of its proper divisors (1784157).

825849859 is a wasteful number, since it uses less digits than its factorization.

825849859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784156.

The product of its digits is 8294400, while the sum is 58.

The square root of 825849859 is about 28737.6035709312. The cubic root of 825849859 is about 938.2106669303.

The spelling of 825849859 in words is "eight hundred twenty-five million, eight hundred forty-nine thousand, eight hundred fifty-nine".