137561533 has 4 divisors (see below), whose sum is σ = 137636928. Its totient is φ = 137486140.

The previous prime is 137561531. The next prime is 137561561. The reversal of 137561533 is 335165731.

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: 335165731 = 29 ⋅11557439.

It is a cyclic number.

It is not a de Polignac number, because 137561533 - 2¹ = 137561531 is a prime.

It is a super-2 number, since 2×137561533² = 37846350722620178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137561531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34891 + ... + 38632.

It is an arithmetic number, because the mean of its divisors is an integer number (34409232).

Almost surely, 2^137561533 is an apocalyptic number.

It is an amenable number.

137561533 is a deficient number, since it is larger than the sum of its proper divisors (75395).

137561533 is an equidigital number, since it uses as much as digits as its factorization.

137561533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75394.

The product of its digits is 28350, while the sum is 34.

The square root of 137561533 is about 11728.6628820169. The cubic root of 137561533 is about 516.2170393275.

The spelling of 137561533 in words is "one hundred thirty-seven million, five hundred sixty-one thousand, five hundred thirty-three".