825643623 has 8 divisors (see below), whose sum is σ = 1258123648. Its totient is φ = 471796344.

The previous prime is 825643603. The next prime is 825643657. The reversal of 825643623 is 326346528.

It is a happy number.

825643623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 825643623 - 2⁵ = 825643591 is a prime.

It is a super-2 number, since 2×825643623² = 1363374784401132258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825643603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19658161 + ... + 19658202.

It is an arithmetic number, because the mean of its divisors is an integer number (157265456).

Almost surely, 2^825643623 is an apocalyptic number.

825643623 is a deficient number, since it is larger than the sum of its proper divisors (432480025).

825643623 is a wasteful number, since it uses less digits than its factorization.

825643623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39316373.

The product of its digits is 207360, while the sum is 39.

The square root of 825643623 is about 28734.0150866530. The cubic root of 825643623 is about 938.1325619648.

The spelling of 825643623 in words is "eight hundred twenty-five million, six hundred forty-three thousand, six hundred twenty-three".