135969691 has 8 divisors (see below), whose sum is σ = 159740784. Its totient is φ = 114100320.

The previous prime is 135969677. The next prime is 135969697. The reversal of 135969691 is 196969531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135969691 - 2¹³ = 135961499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135969697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475276 + ... + 475561.

It is an arithmetic number, because the mean of its divisors is an integer number (19967598).

Almost surely, 2^135969691 is an apocalyptic number.

135969691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

135969691 is a deficient number, since it is larger than the sum of its proper divisors (23771093).

135969691 is a wasteful number, since it uses less digits than its factorization.

135969691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950861.

The product of its digits is 393660, while the sum is 49.

The square root of 135969691 is about 11660.6042296272. The cubic root of 135969691 is about 514.2181128553.

The spelling of 135969691 in words is "one hundred thirty-five million, nine hundred sixty-nine thousand, six hundred ninety-one".