136873329 has 4 divisors (see below), whose sum is σ = 182497776. Its totient is φ = 91248884.

The previous prime is 136873313. The next prime is 136873349. The reversal of 136873329 is 923378631.

It is a happy number.

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 136873329 - 2⁴ = 136873313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136873349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22812219 + ... + 22812224.

It is an arithmetic number, because the mean of its divisors is an integer number (45624444).

Almost surely, 2^136873329 is an apocalyptic number.

It is an amenable number.

136873329 is a deficient number, since it is larger than the sum of its proper divisors (45624447).

136873329 is an equidigital number, since it uses as much as digits as its factorization.

136873329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45624446.

The product of its digits is 163296, while the sum is 42.

The square root of 136873329 is about 11699.2875424104. The cubic root of 136873329 is about 515.3547422369.

The spelling of 136873329 in words is "one hundred thirty-six million, eight hundred seventy-three thousand, three hundred twenty-nine".