825133779 has 6 divisors (see below), whose sum is σ = 1191859916. Its totient is φ = 550089180.

The previous prime is 825133759. The next prime is 825133783. The reversal of 825133779 is 977331528.

It is a happy number.

825133779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 825133779 - 2⁸ = 825133523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825133759) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45840757 + ... + 45840774.

Almost surely, 2^825133779 is an apocalyptic number.

825133779 is a deficient number, since it is larger than the sum of its proper divisors (366726137).

825133779 is a wasteful number, since it uses less digits than its factorization.

825133779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91681537 (or 91681534 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 825133779 is about 28725.1419317642. The cubic root of 825133779 is about 937.9394198187.

The spelling of 825133779 in words is "eight hundred twenty-five million, one hundred thirty-three thousand, seven hundred seventy-nine".