136973780 has 18 divisors (see below), whose sum is σ = 287754894. Its totient is φ = 54768576.

The previous prime is 136973773. The next prime is 136973801. The reversal of 136973780 is 87379631.

It can be written as a sum of positive squares in 3 ways, for example, as 90706576 + 46267204 = 9524^2 + 6802^2 .

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 5 ways as a sum of consecutive naturals, for example, 51032 + ... + 53648.

It is an arithmetic number, because the mean of its divisors is an integer number (15986383).

Almost surely, 2^136973780 is an apocalyptic number.

136973780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136973780 is an abundant number, since it is smaller than the sum of its proper divisors (150781114).

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

136973780 is an frugal number, since it uses more digits than its factorization.

136973780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5243 (or 2624 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 136973780 is about 11703.5797942339. The cubic root of 136973780 is about 515.4807839346.

The spelling of 136973780 in words is "one hundred thirty-six million, nine hundred seventy-three thousand, seven hundred eighty".