136355489 has 2 divisors, whose sum is σ = 136355490. Its totient is φ = 136355488.

The previous prime is 136355467. The next prime is 136355497. The reversal of 136355489 is 984553631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133795489 + 2560000 = 11567^2 + 1600^2 .

It is an emirp because it is prime and its reverse (984553631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136355489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136354489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68177744 + 68177745.

It is an arithmetic number, because the mean of its divisors is an integer number (68177745).

Almost surely, 2^136355489 is an apocalyptic number.

It is an amenable number.

136355489 is a deficient number, since it is larger than the sum of its proper divisors (1).

136355489 is an equidigital number, since it uses as much as digits as its factorization.

136355489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 44.

The square root of 136355489 is about 11677.1353079426. The cubic root of 136355489 is about 514.7039980613.

The spelling of 136355489 in words is "one hundred thirty-six million, three hundred fifty-five thousand, four hundred eighty-nine".