825819369 has 4 divisors (see below), whose sum is σ = 1101092496. Its totient is φ = 550546244.

The previous prime is 825819361. The next prime is 825819377. The reversal of 825819369 is 963918528.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (825819361) and next prime (825819377).

It is a cyclic number.

It is not a de Polignac number, because 825819369 - 2³ = 825819361 is a prime.

It is a super-2 number, since 2×825819369² = 1363955260431116322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (825819361) 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, 137636559 + ... + 137636564.

It is an arithmetic number, because the mean of its divisors is an integer number (275273124).

Almost surely, 2^825819369 is an apocalyptic number.

It is an amenable number.

825819369 is a deficient number, since it is larger than the sum of its proper divisors (275273127).

825819369 is a wasteful number, since it uses less digits than its factorization.

825819369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275273126.

The product of its digits is 933120, while the sum is 51.

The square root of 825819369 is about 28737.0730764286. The cubic root of 825819369 is about 938.1991206849.

The spelling of 825819369 in words is "eight hundred twenty-five million, eight hundred nineteen thousand, three hundred sixty-nine".