194340613 has 4 divisors (see below), whose sum is σ = 199593100. Its totient is φ = 189088128.

The previous prime is 194340611. The next prime is 194340647. The reversal of 194340613 is 316043491.

194340613 = 9857² + 9858².

194340613 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.

It can be written as a sum of positive squares in 2 ways, for example, as 97180164 + 97160449 = 9858^2 + 9857^2 .

It is a cyclic number.

It is not a de Polignac number, because 194340613 - 2¹ = 194340611 is a prime.

It is a super-2 number, since 2×194340613² = 75536547722431538, which 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 (194340611) 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, 2626188 + ... + 2626261.

It is an arithmetic number, because the mean of its divisors is an integer number (49898275).

Almost surely, 2^194340613 is an apocalyptic number.

194340613 is the 9858-th centered square number.

It is an amenable number.

194340613 is a deficient number, since it is larger than the sum of its proper divisors (5252487).

194340613 is an equidigital number, since it uses as much as digits as its factorization.

194340613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5252486.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 194340613 is about 13940.6102090260. The cubic root of 194340613 is about 579.2346355394.

The spelling of 194340613 in words is "one hundred ninety-four million, three hundred forty thousand, six hundred thirteen".