825469000921 has 4 divisors (see below), whose sum is σ = 825472967332. Its totient is φ = 825465034512.

The previous prime is 825469000907. The next prime is 825469000981. The reversal of 825469000921 is 129000964528.

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 135913144896 + 689555856025 = 368664^2 + 830395^2 .

It is a cyclic number.

It is not a de Polignac number, because 825469000921 - 2¹³ = 825468992729 is a prime.

It is a deceptive number, since it divides R_825469000920.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825469000981) 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, 1652670 + ... + 2093383.

It is an arithmetic number, because the mean of its divisors is an integer number (206368241833).

It is a Poulet number, since it divides 2^825469000920-1.

Almost surely, 2^825469000921 is an apocalyptic number.

It is an amenable number.

825469000921 is a deficient number, since it is larger than the sum of its proper divisors (3966411).

825469000921 is a wasteful number, since it uses less digits than its factorization.

825469000921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3966410.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 825469000921 in words is "eight hundred twenty-five billion, four hundred sixty-nine million, nine hundred twenty-one", and thus it is an aban number.