137230745 has 4 divisors (see below), whose sum is σ = 164676900. Its totient is φ = 109784592.

The previous prime is 137230733. The next prime is 137230771. The reversal of 137230745 is 547032731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547032731 = 7 ⋅78147533.

It can be written as a sum of positive squares in 2 ways, for example, as 31058329 + 106172416 = 5573^2 + 10304^2 .

It is a cyclic number.

It is not a de Polignac number, because 137230745 - 2¹⁰ = 137229721 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13723070 + ... + 13723079.

It is an arithmetic number, because the mean of its divisors is an integer number (41169225).

Almost surely, 2^137230745 is an apocalyptic number.

It is an amenable number.

137230745 is a deficient number, since it is larger than the sum of its proper divisors (27446155).

137230745 is an equidigital number, since it uses as much as digits as its factorization.

137230745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27446154.

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 137230745 is about 11714.5527016613. The cubic root of 137230745 is about 515.8029326290.

The spelling of 137230745 in words is "one hundred thirty-seven million, two hundred thirty thousand, seven hundred forty-five".