136831223 has 2 divisors, whose sum is σ = 136831224. Its totient is φ = 136831222.

The previous prime is 136831199. The next prime is 136831237. The reversal of 136831223 is 322138631.

It is a strong prime.

It is an emirp because it is prime and its reverse (322138631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136831223 - 2⁶ = 136831159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136831243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68415611 + 68415612.

It is an arithmetic number, because the mean of its divisors is an integer number (68415612).

Almost surely, 2^136831223 is an apocalyptic number.

136831223 is a deficient number, since it is larger than the sum of its proper divisors (1).

136831223 is an equidigital number, since it uses as much as digits as its factorization.

136831223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 29.

The square root of 136831223 is about 11697.4878927059. The cubic root of 136831223 is about 515.3018910535.

Adding to 136831223 its reverse (322138631), we get a palindrome (458969854).

The spelling of 136831223 in words is "one hundred thirty-six million, eight hundred thirty-one thousand, two hundred twenty-three".