137238065 has 4 divisors (see below), whose sum is σ = 164685684. Its totient is φ = 109790448.

The previous prime is 137238037. The next prime is 137238067. The reversal of 137238065 is 560832731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 560832731 = 157 ⋅3572183.

It can be written as a sum of positive squares in 2 ways, for example, as 44943616 + 92294449 = 6704^2 + 9607^2 .

It is a cyclic number.

It is not a de Polignac number, because 137238065 - 2⁸ = 137237809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137238067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13723802 + ... + 13723811.

It is an arithmetic number, because the mean of its divisors is an integer number (41171421).

Almost surely, 2^137238065 is an apocalyptic number.

It is an amenable number.

137238065 is a deficient number, since it is larger than the sum of its proper divisors (27447619).

137238065 is an equidigital number, since it uses as much as digits as its factorization.

137238065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27447618.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 137238065 is about 11714.8651293986. The cubic root of 137238065 is about 515.8121035825.

The spelling of 137238065 in words is "one hundred thirty-seven million, two hundred thirty-eight thousand, sixty-five".