199038613 has 4 divisors (see below), whose sum is σ = 199316160. Its totient is φ = 198761068.

The previous prime is 199038599. The next prime is 199038643. The reversal of 199038613 is 316830991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 316830991 = 191 ⋅1658801.

It is a cyclic number.

It is not a de Polignac number, because 199038613 - 2¹³ = 199030421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199038643) 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, 137695 + ... + 139132.

It is an arithmetic number, because the mean of its divisors is an integer number (49829040).

Almost surely, 2^199038613 is an apocalyptic number.

It is an amenable number.

199038613 is a deficient number, since it is larger than the sum of its proper divisors (277547).

199038613 is an equidigital number, since it uses as much as digits as its factorization.

199038613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277546.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 199038613 is about 14108.1045147816. The cubic root of 199038613 is about 583.8650046468.

The spelling of 199038613 in words is "one hundred ninety-nine million, thirty-eight thousand, six hundred thirteen".