137503573 has 4 divisors (see below), whose sum is σ = 138051648. Its totient is φ = 136955500.

The previous prime is 137503549. The next prime is 137503643. The reversal of 137503573 is 375305731.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 375305731 = 1913 ⋅196187.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137503573 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 (137506573) 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, 273661 + ... + 274162.

It is an arithmetic number, because the mean of its divisors is an integer number (34512912).

Almost surely, 2^137503573 is an apocalyptic number.

It is an amenable number.

137503573 is a deficient number, since it is larger than the sum of its proper divisors (548075).

137503573 is an equidigital number, since it uses as much as digits as its factorization.

137503573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548074.

The product of its (nonzero) digits is 33075, while the sum is 34.

The square root of 137503573 is about 11726.1917518008. The cubic root of 137503573 is about 516.1445284008.

The spelling of 137503573 in words is "one hundred thirty-seven million, five hundred three thousand, five hundred seventy-three".