135642697 has 6 divisors (see below), whose sum is σ = 137009294. Its totient is φ = 134289600.

The previous prime is 135642679. The next prime is 135642709. The reversal of 135642697 is 796246531.

It can be written as a sum of positive squares in 3 ways, for example, as 45373696 + 90269001 = 6736^2 + 9501^2 .

It is not a de Polignac number, because 135642697 - 2¹⁹ = 135118409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135642097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3553 + ... + 16849.

Almost surely, 2^135642697 is an apocalyptic number.

It is an amenable number.

135642697 is a deficient number, since it is larger than the sum of its proper divisors (1366597).

135642697 is an equidigital number, since it uses as much as digits as its factorization.

135642697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13499 (or 13398 counting only the distinct ones).

The product of its digits is 272160, while the sum is 43.

The square root of 135642697 is about 11646.5744749261. The cubic root of 135642697 is about 513.8055669696.

It can be divided in two parts, 13564 and 2697, that added together give a palindrome (16261).

The spelling of 135642697 in words is "one hundred thirty-five million, six hundred forty-two thousand, six hundred ninety-seven".