137274509 has 2 divisors, whose sum is σ = 137274510. Its totient is φ = 137274508.

The previous prime is 137274503. The next prime is 137274523. The reversal of 137274509 is 905472731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108222409 + 29052100 = 10403^2 + 5390^2 .

It is an emirp because it is prime and its reverse (905472731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137274509 - 2⁴ = 137274493 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137274503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68637254 + 68637255.

It is an arithmetic number, because the mean of its divisors is an integer number (68637255).

Almost surely, 2^137274509 is an apocalyptic number.

It is an amenable number.

137274509 is a deficient number, since it is larger than the sum of its proper divisors (1).

137274509 is an equidigital number, since it uses as much as digits as its factorization.

137274509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 137274509 is about 11716.4204857968. The cubic root of 137274509 is about 515.8577580506.

The spelling of 137274509 in words is "one hundred thirty-seven million, two hundred seventy-four thousand, five hundred nine".