825340673 has 4 divisors (see below), whose sum is σ = 825418308. Its totient is φ = 825263040.

The previous prime is 825340661. The next prime is 825340693. The reversal of 825340673 is 376043528.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 388405264 + 436935409 = 19708^2 + 20903^2 .

It is a cyclic number.

It is not a de Polignac number, because 825340673 - 2¹⁴ = 825324289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825340693) 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, 19748 + ... + 45173.

It is an arithmetic number, because the mean of its divisors is an integer number (206354577).

Almost surely, 2^825340673 is an apocalyptic number.

It is an amenable number.

825340673 is a deficient number, since it is larger than the sum of its proper divisors (77635).

825340673 is a wasteful number, since it uses less digits than its factorization.

825340673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77634.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 825340673 is about 28728.7429763295. The cubic root of 825340673 is about 938.0178062277.

The spelling of 825340673 in words is "eight hundred twenty-five million, three hundred forty thousand, six hundred seventy-three".