137961193 has 4 divisors (see below), whose sum is σ = 138103380. Its totient is φ = 137819008.

The previous prime is 137961181. The next prime is 137961221. The reversal of 137961193 is 391169731.

137961193 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 83393424 + 54567769 = 9132^2 + 7387^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137961193 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137961113) 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, 69628 + ... + 71581.

It is an arithmetic number, because the mean of its divisors is an integer number (34525845).

Almost surely, 2^137961193 is an apocalyptic number.

It is an amenable number.

137961193 is a deficient number, since it is larger than the sum of its proper divisors (142187).

137961193 is an equidigital number, since it uses as much as digits as its factorization.

137961193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142186.

The product of its digits is 30618, while the sum is 40.

The square root of 137961193 is about 11745.6882727237. The cubic root of 137961193 is about 516.7164808486.

The spelling of 137961193 in words is "one hundred thirty-seven million, nine hundred sixty-one thousand, one hundred ninety-three".