136989312 has 96 divisors (see below), whose sum is σ = 373793280. Its totient is φ = 44448768.

The previous prime is 136989299. The next prime is 136989319. The reversal of 136989312 is 213989631.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (136989319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1078593 + ... + 1078719.

It is an arithmetic number, because the mean of its divisors is an integer number (3893680).

Almost surely, 2^136989312 is an apocalyptic number.

136989312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136989312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186896640).

136989312 is an abundant number, since it is smaller than the sum of its proper divisors (236803968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136989312 is an equidigital number, since it uses as much as digits as its factorization.

136989312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 185 counting only the distinct ones).

The product of its digits is 69984, while the sum is 42.

The square root of 136989312 is about 11704.2433330822. The cubic root of 136989312 is about 515.5002673348.

The spelling of 136989312 in words is "one hundred thirty-six million, nine hundred eighty-nine thousand, three hundred twelve".