135616549 has 2 divisors, whose sum is σ = 135616550. Its totient is φ = 135616548.

The previous prime is 135616543. The next prime is 135616567. The reversal of 135616549 is 945616531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102921025 + 32695524 = 10145^2 + 5718^2 .

It is a cyclic number.

It is not a de Polignac number, because 135616549 - 2³ = 135616541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135616541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67808274 + 67808275.

It is an arithmetic number, because the mean of its divisors is an integer number (67808275).

Almost surely, 2^135616549 is an apocalyptic number.

It is an amenable number.

135616549 is a deficient number, since it is larger than the sum of its proper divisors (1).

135616549 is an equidigital number, since it uses as much as digits as its factorization.

135616549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 40.

The square root of 135616549 is about 11645.4518589877. The cubic root of 135616549 is about 513.7725492162.

The spelling of 135616549 in words is "one hundred thirty-five million, six hundred sixteen thousand, five hundred forty-nine".