135172997 has 2 divisors, whose sum is σ = 135172998. Its totient is φ = 135172996.

The previous prime is 135172979. The next prime is 135173009. The reversal of 135172997 is 799271531.

Together with previous prime (135172979) 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., 103205281 + 31967716 = 10159^2 + 5654^2 .

It is a cyclic number.

It is not a de Polignac number, because 135172997 - 2²⁶ = 68064133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135172907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67586498 + 67586499.

It is an arithmetic number, because the mean of its divisors is an integer number (67586499).

Almost surely, 2^135172997 is an apocalyptic number.

It is an amenable number.

135172997 is a deficient number, since it is larger than the sum of its proper divisors (1).

135172997 is an equidigital number, since it uses as much as digits as its factorization.

135172997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 119070, while the sum is 44.

The square root of 135172997 is about 11626.3922607144. The cubic root of 135172997 is about 513.2118169200.

The spelling of 135172997 in words is "one hundred thirty-five million, one hundred seventy-two thousand, nine hundred ninety-seven".