136520443 has 2 divisors, whose sum is σ = 136520444. Its totient is φ = 136520442.

The previous prime is 136520437. The next prime is 136520507. The reversal of 136520443 is 344025631.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136520443 is a prime.

It is a super-3 number, since 3×136520443³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (136520843) 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 as a sum of consecutive naturals, namely, 68260221 + 68260222.

It is an arithmetic number, because the mean of its divisors is an integer number (68260222).

Almost surely, 2^136520443 is an apocalyptic number.

136520443 is a deficient number, since it is larger than the sum of its proper divisors (1).

136520443 is an equidigital number, since it uses as much as digits as its factorization.

136520443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 136520443 is about 11684.1962924285. The cubic root of 136520443 is about 514.9114662276.

The spelling of 136520443 in words is "one hundred thirty-six million, five hundred twenty thousand, four hundred forty-three".