136820349 has 12 divisors (see below), whose sum is σ = 208031200. Its totient is φ = 86412744.

The previous prime is 136820317. The next prime is 136820363. The reversal of 136820349 is 943028631.

It is not a de Polignac number, because 136820349 - 2⁵ = 136820317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136820309) 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, 399889 + ... + 400230.

Almost surely, 2^136820349 is an apocalyptic number.

136820349 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

136820349 is a deficient number, since it is larger than the sum of its proper divisors (71210851).

136820349 is a wasteful number, since it uses less digits than its factorization.

136820349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800144 (or 800141 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 136820349 is about 11697.0230828190. The cubic root of 136820349 is about 515.2882403162.

The spelling of 136820349 in words is "one hundred thirty-six million, eight hundred twenty thousand, three hundred forty-nine".