136999220 has 24 divisors (see below), whose sum is σ = 287927808. Its totient is φ = 54756000.

The previous prime is 136999217. The next prime is 136999241. The reversal of 136999220 is 22999631.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37265 + ... + 40775.

It is an arithmetic number, because the mean of its divisors is an integer number (11996992).

Almost surely, 2^136999220 is an apocalyptic number.

136999220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136999220 is an abundant number, since it is smaller than the sum of its proper divisors (150928588).

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

136999220 is a wasteful number, since it uses less digits than its factorization.

136999220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5471 (or 5469 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 136999220 is about 11704.6665907235. Note that the first 3 decimals coincide. The cubic root of 136999220 is about 515.5126951986.

The spelling of 136999220 in words is "one hundred thirty-six million, nine hundred ninety-nine thousand, two hundred twenty".