137321517 has 4 divisors (see below), whose sum is σ = 183095360. Its totient is φ = 91547676.

The previous prime is 137321501. The next prime is 137321521. The reversal of 137321517 is 715123731.

137321517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 137321517 - 2⁴ = 137321501 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 (137321567) 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, 22886917 + ... + 22886922.

It is an arithmetic number, because the mean of its divisors is an integer number (45773840).

Almost surely, 2^137321517 is an apocalyptic number.

It is an amenable number.

137321517 is a deficient number, since it is larger than the sum of its proper divisors (45773843).

137321517 is an equidigital number, since it uses as much as digits as its factorization.

137321517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45773842.

The product of its digits is 4410, while the sum is 30.

The square root of 137321517 is about 11718.4263875317. The cubic root of 137321517 is about 515.9166344198.

The spelling of 137321517 in words is "one hundred thirty-seven million, three hundred twenty-one thousand, five hundred seventeen".