137928191 has 8 divisors (see below), whose sum is σ = 146232720. Its totient is φ = 129644928.

The previous prime is 137928187. The next prime is 137928199. The reversal of 137928191 is 191829731.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 137928191 - 2² = 137928187 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 (137928199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9200 + ... + 18986.

It is an arithmetic number, because the mean of its divisors is an integer number (18279090).

Almost surely, 2^137928191 is an apocalyptic number.

137928191 is a deficient number, since it is larger than the sum of its proper divisors (8304529).

137928191 is an equidigital number, since it uses as much as digits as its factorization.

137928191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10633.

The product of its digits is 27216, while the sum is 41.

The square root of 137928191 is about 11744.2833327539. The cubic root of 137928191 is about 516.6752759347.

The spelling of 137928191 in words is "one hundred thirty-seven million, nine hundred twenty-eight thousand, one hundred ninety-one".