135528749 has 2 divisors, whose sum is σ = 135528750. Its totient is φ = 135528748.

The previous prime is 135528727. The next prime is 135528779. The reversal of 135528749 is 947825531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133518025 + 2010724 = 11555^2 + 1418^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135528749 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135528779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67764374 + 67764375.

It is an arithmetic number, because the mean of its divisors is an integer number (67764375).

Almost surely, 2^135528749 is an apocalyptic number.

It is an amenable number.

135528749 is a deficient number, since it is larger than the sum of its proper divisors (1).

135528749 is an equidigital number, since it uses as much as digits as its factorization.

135528749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 44.

The square root of 135528749 is about 11641.6815366166. The cubic root of 135528749 is about 513.6616508329.

The spelling of 135528749 in words is "one hundred thirty-five million, five hundred twenty-eight thousand, seven hundred forty-nine".