136304621 has 2 divisors, whose sum is σ = 136304622. Its totient is φ = 136304620.

The previous prime is 136304617. The next prime is 136304659. The reversal of 136304621 is 126403631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80802121 + 55502500 = 8989^2 + 7450^2 .

It is an emirp because it is prime and its reverse (126403631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136304621 - 2² = 136304617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136304681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68152310 + 68152311.

It is an arithmetic number, because the mean of its divisors is an integer number (68152311).

Almost surely, 2^136304621 is an apocalyptic number.

It is an amenable number.

136304621 is a deficient number, since it is larger than the sum of its proper divisors (1).

136304621 is an equidigital number, since it uses as much as digits as its factorization.

136304621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 136304621 is about 11674.9570020621. The cubic root of 136304621 is about 514.6399859226.

The spelling of 136304621 in words is "one hundred thirty-six million, three hundred four thousand, six hundred twenty-one".