136215449 has 2 divisors, whose sum is σ = 136215450. Its totient is φ = 136215448.

The previous prime is 136215419. The next prime is 136215461. The reversal of 136215449 is 944512631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135303424 + 912025 = 11632^2 + 955^2 .

It is an emirp because it is prime and its reverse (944512631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136215449 - 2⁸ = 136215193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136215419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68107724 + 68107725.

It is an arithmetic number, because the mean of its divisors is an integer number (68107725).

Almost surely, 2^136215449 is an apocalyptic number.

It is an amenable number.

136215449 is a deficient number, since it is larger than the sum of its proper divisors (1).

136215449 is an equidigital number, since it uses as much as digits as its factorization.

136215449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 136215449 is about 11671.1374338579. The cubic root of 136215449 is about 514.5277337048.

The spelling of 136215449 in words is "one hundred thirty-six million, two hundred fifteen thousand, four hundred forty-nine".