136609523 has 2 divisors, whose sum is σ = 136609524. Its totient is φ = 136609522.

The previous prime is 136609483. The next prime is 136609547. The reversal of 136609523 is 325906631.

It is a strong prime.

It is an emirp because it is prime and its reverse (325906631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136609523 - 2¹⁶ = 136543987 is a prime.

It is equal to p_7731368 and since 136609523 and 7731368 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (136609553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68304761 + 68304762.

It is an arithmetic number, because the mean of its divisors is an integer number (68304762).

Almost surely, 2^136609523 is an apocalyptic number.

136609523 is a deficient number, since it is larger than the sum of its proper divisors (1).

136609523 is an equidigital number, since it uses as much as digits as its factorization.

136609523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 136609523 is about 11688.0076574239. The cubic root of 136609523 is about 515.0234356382.

The spelling of 136609523 in words is "one hundred thirty-six million, six hundred nine thousand, five hundred twenty-three".