136598489 has 4 divisors (see below), whose sum is σ = 136650624. Its totient is φ = 136546356.

The previous prime is 136598471. The next prime is 136598509. The reversal of 136598489 is 984895631.

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: 984895631 = 571 ⋅1724861.

It is a cyclic number.

It is not a de Polignac number, because 136598489 - 2¹⁶ = 136532953 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 136598489.

It is not an unprimeable number, because it can be changed into a prime (136598419) 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, 21917 + ... + 27450.

It is an arithmetic number, because the mean of its divisors is an integer number (34162656).

Almost surely, 2^136598489 is an apocalyptic number.

It is an amenable number.

136598489 is a deficient number, since it is larger than the sum of its proper divisors (52135).

136598489 is an equidigital number, since it uses as much as digits as its factorization.

136598489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52134.

The product of its digits is 1866240, while the sum is 53.

The square root of 136598489 is about 11687.5356256142. The cubic root of 136598489 is about 515.0095690559.

The spelling of 136598489 in words is "one hundred thirty-six million, five hundred ninety-eight thousand, four hundred eighty-nine".