136573537 has 4 divisors (see below), whose sum is σ = 138612016. Its totient is φ = 134535060.

The previous prime is 136573511. The next prime is 136573553. The reversal of 136573537 is 735375631.

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: 735375631 = 41 ⋅17935991.

It is a cyclic number.

It is not a de Polignac number, because 136573537 - 2²³ = 128184929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136573537.

It is not an unprimeable number, because it can be changed into a prime (136573037) 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, 1019139 + ... + 1019272.

It is an arithmetic number, because the mean of its divisors is an integer number (34653004).

Almost surely, 2^136573537 is an apocalyptic number.

It is an amenable number.

136573537 is a deficient number, since it is larger than the sum of its proper divisors (2038479).

136573537 is an equidigital number, since it uses as much as digits as its factorization.

136573537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038478.

The product of its digits is 198450, while the sum is 40.

The square root of 136573537 is about 11686.4681148754. The cubic root of 136573537 is about 514.9782087741.

The spelling of 136573537 in words is "one hundred thirty-six million, five hundred seventy-three thousand, five hundred thirty-seven".