823198141 has 4 divisors (see below), whose sum is σ = 823405500. Its totient is φ = 822990784.

The previous prime is 823198139. The next prime is 823198169. The reversal of 823198141 is 141891328.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 112975641 + 710222500 = 10629^2 + 26650^2 .

It is a cyclic number.

It is not a de Polignac number, because 823198141 - 2¹ = 823198139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 823198141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823198241) 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, 97606 + ... + 105703.

It is an arithmetic number, because the mean of its divisors is an integer number (205851375).

Almost surely, 2^823198141 is an apocalyptic number.

It is an amenable number.

823198141 is a deficient number, since it is larger than the sum of its proper divisors (207359).

823198141 is a wasteful number, since it uses less digits than its factorization.

823198141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207358.

The product of its digits is 13824, while the sum is 37.

The square root of 823198141 is about 28691.4297482715. The cubic root of 823198141 is about 937.2054246293.

The spelling of 823198141 in words is "eight hundred twenty-three million, one hundred ninety-eight thousand, one hundred forty-one".