136919730 has 64 divisors (see below), whose sum is σ = 341677440. Its totient is φ = 35073024.

The previous prime is 136919729. The next prime is 136919743. The reversal of 136919730 is 37919631.

It is a super-3 number, since 3×136919730³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 292957 + ... + 293423.

It is an arithmetic number, because the mean of its divisors is an integer number (5338710).

Almost surely, 2^136919730 is an apocalyptic number.

136919730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 136919730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170838720).

136919730 is an abundant number, since it is smaller than the sum of its proper divisors (204757710).

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

136919730 is a wasteful number, since it uses less digits than its factorization.

136919730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843.

The product of its (nonzero) digits is 30618, while the sum is 39.

The square root of 136919730 is about 11701.2704438450. The cubic root of 136919730 is about 515.4129719248.

Subtracting from 136919730 its reverse (37919631), we obtain a palindrome (99000099).

The spelling of 136919730 in words is "one hundred thirty-six million, nine hundred nineteen thousand, seven hundred thirty".