823198431 has 8 divisors (see below), whose sum is σ = 1197379584. Its totient is φ = 498908120.

The previous prime is 823198423. The next prime is 823198433. The reversal of 823198431 is 134891328.

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

It is a cyclic number.

It is not a de Polignac number, because 823198431 - 2³ = 823198423 is a prime.

It is a super-2 number, since 2×823198431² = 1355311313601723522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 823198431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823198433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12472671 + ... + 12472736.

It is an arithmetic number, because the mean of its divisors is an integer number (149672448).

Almost surely, 2^823198431 is an apocalyptic number.

823198431 is a deficient number, since it is larger than the sum of its proper divisors (374181153).

823198431 is a wasteful number, since it uses less digits than its factorization.

823198431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24945421.

The product of its digits is 41472, while the sum is 39.

The square root of 823198431 is about 28691.4348020450. The cubic root of 823198431 is about 937.2055346837.

The spelling of 823198431 in words is "eight hundred twenty-three million, one hundred ninety-eight thousand, four hundred thirty-one".