823819469 has 4 divisors (see below), whose sum is σ = 898712160. Its totient is φ = 748926780.

The previous prime is 823819463. The next prime is 823819483. The reversal of 823819469 is 964918328.

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 a cyclic number.

It is not a de Polignac number, because 823819469 - 2⁴ = 823819453 is a prime.

It is a super-2 number, since 2×823819469² = 1357357035006883922, 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 (823819463) 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, 37446329 + ... + 37446350.

It is an arithmetic number, because the mean of its divisors is an integer number (224678040).

Almost surely, 2^823819469 is an apocalyptic number.

It is an amenable number.

823819469 is a deficient number, since it is larger than the sum of its proper divisors (74892691).

823819469 is a wasteful number, since it uses less digits than its factorization.

823819469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74892690.

The product of its digits is 746496, while the sum is 50.

The square root of 823819469 is about 28702.2554688652. The cubic root of 823819469 is about 937.4411578832.

The spelling of 823819469 in words is "eight hundred twenty-three million, eight hundred nineteen thousand, four hundred sixty-nine".