823474397 has 4 divisors (see below), whose sum is σ = 823890816. Its totient is φ = 823057980.

The previous prime is 823474363. The next prime is 823474427. The reversal of 823474397 is 793474328.

823474397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 823474397 - 2¹² = 823470301 is a prime.

It is a super-2 number, since 2×823474397² = 1356220165029027218, 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 (823474697) 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, 205229 + ... + 209202.

It is an arithmetic number, because the mean of its divisors is an integer number (205972704).

Almost surely, 2^823474397 is an apocalyptic number.

It is an amenable number.

823474397 is a deficient number, since it is larger than the sum of its proper divisors (416419).

823474397 is a wasteful number, since it uses less digits than its factorization.

823474397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416418.

The product of its digits is 1016064, while the sum is 47.

The square root of 823474397 is about 28696.2436043465. The cubic root of 823474397 is about 937.3102514230.

The spelling of 823474397 in words is "eight hundred twenty-three million, four hundred seventy-four thousand, three hundred ninety-seven".