136525489 has 4 divisors (see below), whose sum is σ = 136787056. Its totient is φ = 136263924.

The previous prime is 136525481. The next prime is 136525547. The reversal of 136525489 is 984525631.

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: 984525631 = 10657 ⋅92383.

It is a cyclic number.

It is not a de Polignac number, because 136525489 - 2³ = 136525481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136525481) 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, 129999 + ... + 131044.

It is an arithmetic number, because the mean of its divisors is an integer number (34196764).

Almost surely, 2^136525489 is an apocalyptic number.

It is an amenable number.

136525489 is a deficient number, since it is larger than the sum of its proper divisors (261567).

136525489 is an equidigital number, since it uses as much as digits as its factorization.

136525489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261566.

The product of its digits is 259200, while the sum is 43.

The square root of 136525489 is about 11684.4122231287. The cubic root of 136525489 is about 514.9178101157.

It can be divided in two parts, 136 and 525489, that added together give a square (525625 = 725²).

The spelling of 136525489 in words is "one hundred thirty-six million, five hundred twenty-five thousand, four hundred eighty-nine".