136723820 has 12 divisors (see below), whose sum is σ = 287120064. Its totient is φ = 54689520.

The previous prime is 136723813. The next prime is 136723831. The reversal of 136723820 is 28327631.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3418076 + ... + 3418115.

It is an arithmetic number, because the mean of its divisors is an integer number (23926672).

Almost surely, 2^136723820 is an apocalyptic number.

136723820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136723820 is an abundant number, since it is smaller than the sum of its proper divisors (150396244).

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

136723820 is a wasteful number, since it uses less digits than its factorization.

136723820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6836200 (or 6836198 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 136723820 is about 11692.8961339781. The cubic root of 136723820 is about 515.1670303719.

The spelling of 136723820 in words is "one hundred thirty-six million, seven hundred twenty-three thousand, eight hundred twenty".