136650421 has 2 divisors, whose sum is σ = 136650422. Its totient is φ = 136650420.

The previous prime is 136650391. The next prime is 136650427. The reversal of 136650421 is 124056631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78127921 + 58522500 = 8839^2 + 7650^2 .

It is a cyclic number.

It is not a de Polignac number, because 136650421 - 2¹¹ = 136648373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136650421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136650427) 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, 68325210 + 68325211.

It is an arithmetic number, because the mean of its divisors is an integer number (68325211).

Almost surely, 2^136650421 is an apocalyptic number.

It is an amenable number.

136650421 is a deficient number, since it is larger than the sum of its proper divisors (1).

136650421 is an equidigital number, since it uses as much as digits as its factorization.

136650421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 136650421 is about 11689.7570975620. The cubic root of 136650421 is about 515.0748262157.

The spelling of 136650421 in words is "one hundred thirty-six million, six hundred fifty thousand, four hundred twenty-one".