194911513 has 4 divisors (see below), whose sum is σ = 197101620. Its totient is φ = 192721408.

The previous prime is 194911487. The next prime is 194911529. The reversal of 194911513 is 315119491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 315119491 = 37 ⋅8516743.

It can be written as a sum of positive squares in 2 ways, for example, as 60652944 + 134258569 = 7788^2 + 11587^2 .

It is a cyclic number.

It is not a de Polignac number, because 194911513 - 2¹³ = 194903321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194911573) 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, 1094920 + ... + 1095097.

It is an arithmetic number, because the mean of its divisors is an integer number (49275405).

Almost surely, 2^194911513 is an apocalyptic number.

It is an amenable number.

194911513 is a deficient number, since it is larger than the sum of its proper divisors (2190107).

194911513 is an equidigital number, since it uses as much as digits as its factorization.

194911513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190106.

The product of its digits is 4860, while the sum is 34.

The square root of 194911513 is about 13961.0713414122. The cubic root of 194911513 is about 579.8012725830.

The spelling of 194911513 in words is "one hundred ninety-four million, nine hundred eleven thousand, five hundred thirteen".