136621193 has 4 divisors (see below), whose sum is σ = 136665360. Its totient is φ = 136577028.

The previous prime is 136621183. The next prime is 136621201. The reversal of 136621193 is 391126631.

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: 391126631 = 7 ⋅55875233.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136621193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136621103) 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, 17063 + ... + 23756.

It is an arithmetic number, because the mean of its divisors is an integer number (34166340).

Almost surely, 2^136621193 is an apocalyptic number.

It is an amenable number.

136621193 is a deficient number, since it is larger than the sum of its proper divisors (44167).

136621193 is an equidigital number, since it uses as much as digits as its factorization.

136621193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44166.

The product of its digits is 5832, while the sum is 32.

The square root of 136621193 is about 11688.5068764150. The cubic root of 136621193 is about 515.0381006782.

The spelling of 136621193 in words is "one hundred thirty-six million, six hundred twenty-one thousand, one hundred ninety-three".