135604897 has 2 divisors, whose sum is σ = 135604898. Its totient is φ = 135604896.

The previous prime is 135604879. The next prime is 135604901. The reversal of 135604897 is 798406531.

Together with previous prime (135604879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70576801 + 65028096 = 8401^2 + 8064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135604897 is a prime.

It is not a weakly prime, because it can be changed into another prime (135604837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67802448 + 67802449.

It is an arithmetic number, because the mean of its divisors is an integer number (67802449).

Almost surely, 2^135604897 is an apocalyptic number.

It is an amenable number.

135604897 is a deficient number, since it is larger than the sum of its proper divisors (1).

135604897 is an equidigital number, since it uses as much as digits as its factorization.

135604897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 135604897 is about 11644.9515670955. The cubic root of 135604897 is about 513.7578345685.

The spelling of 135604897 in words is "one hundred thirty-five million, six hundred four thousand, eight hundred ninety-seven".