135136997 has 4 divisors (see below), whose sum is σ = 136032096. Its totient is φ = 134241900.

The previous prime is 135136973. The next prime is 135136999. The reversal of 135136997 is 799631531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135136997 - 2⁸ = 135136741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135136999) 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 in 3 ways as a sum of consecutive naturals, for example, 447323 + ... + 447624.

It is an arithmetic number, because the mean of its divisors is an integer number (34008024).

Almost surely, 2^135136997 is an apocalyptic number.

It is an amenable number.

135136997 is a deficient number, since it is larger than the sum of its proper divisors (895099).

135136997 is an equidigital number, since it uses as much as digits as its factorization.

135136997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895098.

The product of its digits is 153090, while the sum is 44.

The square root of 135136997 is about 11624.8439559419. The cubic root of 135136997 is about 513.1662524305.

The spelling of 135136997 in words is "one hundred thirty-five million, one hundred thirty-six thousand, nine hundred ninety-seven".