199174948381 has 4 divisors (see below), whose sum is σ = 204558055132. Its totient is φ = 193791841632.

The previous prime is 199174948369. The next prime is 199174948409. The reversal of 199174948381 is 183849471991.

It is a happy number.

199174948381 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 an emirpimes, since its reverse is a distinct semiprime: 183849471991 = 17 ⋅10814674823.

It can be written as a sum of positive squares in 2 ways, for example, as 130758176025 + 68416772356 = 361605^2 + 261566^2 .

It is a cyclic number.

It is not a de Polignac number, because 199174948381 - 2²³ = 199166559773 is a prime.

It is a super-2 number, since 2×199174948381² (a number of 23 digits) 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 (199174942381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2691553320 + ... + 2691553393.

It is an arithmetic number, because the mean of its divisors is an integer number (51139513783).

Almost surely, 2^199174948381 is an apocalyptic number.

It is an amenable number.

199174948381 is a deficient number, since it is larger than the sum of its proper divisors (5383106751).

199174948381 is an equidigital number, since it uses as much as digits as its factorization.

199174948381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5383106750.

The product of its digits is 15676416, while the sum is 64.

The spelling of 199174948381 in words is "one hundred ninety-nine billion, one hundred seventy-four million, nine hundred forty-eight thousand, three hundred eighty-one".