135691369 has 16 divisors (see below), whose sum is σ = 156312000. Its totient is φ = 116493120.

The previous prime is 135691337. The next prime is 135691373. The reversal of 135691369 is 963196531.

It is a cyclic number.

It is not a de Polignac number, because 135691369 - 2⁵ = 135691337 is a prime.

It is a super-2 number, since 2×135691369² = 36824295242188322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135691669) 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 15 ways as a sum of consecutive naturals, for example, 80467 + ... + 82135.

It is an arithmetic number, because the mean of its divisors is an integer number (9769500).

Almost surely, 2^135691369 is an apocalyptic number.

135691369 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

135691369 is a deficient number, since it is larger than the sum of its proper divisors (20620631).

135691369 is a wasteful number, since it uses less digits than its factorization.

135691369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088.

The product of its digits is 131220, while the sum is 43.

The square root of 135691369 is about 11648.6638289548. The cubic root of 135691369 is about 513.8670150596.

The spelling of 135691369 in words is "one hundred thirty-five million, six hundred ninety-one thousand, three hundred sixty-nine".