137188145 has 4 divisors (see below), whose sum is σ = 164625780. Its totient is φ = 109750512.

The previous prime is 137188141. The next prime is 137188153. The reversal of 137188145 is 541881731.

It is a happy number.

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 58262689 + 78925456 = 7633^2 + 8884^2 .

It is a cyclic number.

It is not a de Polignac number, because 137188145 - 2² = 137188141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 137188099 and 137188108.

It is not an unprimeable number, because it can be changed into a prime (137188141) 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, 13718810 + ... + 13718819.

It is an arithmetic number, because the mean of its divisors is an integer number (41156445).

Almost surely, 2^137188145 is an apocalyptic number.

It is an amenable number.

137188145 is a deficient number, since it is larger than the sum of its proper divisors (27437635).

137188145 is an equidigital number, since it uses as much as digits as its factorization.

137188145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27437634.

The product of its digits is 26880, while the sum is 38.

The square root of 137188145 is about 11712.7343092892. The cubic root of 137188145 is about 515.7495542139.

The spelling of 137188145 in words is "one hundred thirty-seven million, one hundred eighty-eight thousand, one hundred forty-five".