153608989 has 4 divisors (see below), whose sum is σ = 153865180. Its totient is φ = 153352800.

The previous prime is 153608971. The next prime is 153608993. The reversal of 153608989 is 989806351.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56881764 + 96727225 = 7542^2 + 9835^2 .

It is a cyclic number.

It is not a de Polignac number, because 153608989 - 2¹⁷ = 153477917 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 (153608089) 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, 127194 + ... + 128395.

It is an arithmetic number, because the mean of its divisors is an integer number (38466295).

Almost surely, 2^153608989 is an apocalyptic number.

It is an amenable number.

153608989 is a deficient number, since it is larger than the sum of its proper divisors (256191).

153608989 is an equidigital number, since it uses as much as digits as its factorization.

153608989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256190.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 153608989 is about 12393.9093509675. The cubic root of 153608989 is about 535.5568069675.

The spelling of 153608989 in words is "one hundred fifty-three million, six hundred eight thousand, nine hundred eighty-nine".