194192513 has 8 divisors (see below), whose sum is σ = 205756200. Its totient is φ = 182644480.

The previous prime is 194192501. The next prime is 194192533. The reversal of 194192513 is 315291491.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 76860289 + 117332224 = 8767^2 + 10832^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194192513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (194192533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30203 + ... + 36063.

It is an arithmetic number, because the mean of its divisors is an integer number (25719525).

Almost surely, 2^194192513 is an apocalyptic number.

It is an amenable number.

194192513 is a deficient number, since it is larger than the sum of its proper divisors (11563687).

194192513 is a wasteful number, since it uses less digits than its factorization.

194192513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7827.

The product of its digits is 9720, while the sum is 35.

The square root of 194192513 is about 13935.2973775230. The cubic root of 194192513 is about 579.0874601779.

The spelling of 194192513 in words is "one hundred ninety-four million, one hundred ninety-two thousand, five hundred thirteen".