136934809 has 4 divisors (see below), whose sum is σ = 149383440. Its totient is φ = 124486180.

The previous prime is 136934797. The next prime is 136934827. The reversal of 136934809 is 908439631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 136934809 - 2⁹ = 136934297 is a prime.

It is a super-2 number, since 2×136934809² = 37502283831732962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136934899) by changing a digit.

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, 6224299 + ... + 6224320.

It is an arithmetic number, because the mean of its divisors is an integer number (37345860).

Almost surely, 2^136934809 is an apocalyptic number.

It is an amenable number.

136934809 is a deficient number, since it is larger than the sum of its proper divisors (12448631).

136934809 is a wasteful number, since it uses less digits than its factorization.

136934809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12448630.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 136934809 is about 11701.9147578505. The cubic root of 136934809 is about 515.4318920783.

The spelling of 136934809 in words is "one hundred thirty-six million, nine hundred thirty-four thousand, eight hundred nine".