136869591 has 8 divisors (see below), whose sum is σ = 182853360. Its totient is φ = 91066112.

The previous prime is 136869583. The next prime is 136869631. The reversal of 136869591 is 195968631.

136869591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 136869591 - 2³ = 136869583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136869591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136869541) 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, 43290 + ... + 46343.

It is an arithmetic number, because the mean of its divisors is an integer number (22856670).

Almost surely, 2^136869591 is an apocalyptic number.

136869591 is a deficient number, since it is larger than the sum of its proper divisors (45983769).

136869591 is an equidigital number, since it uses as much as digits as its factorization.

136869591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90145.

The product of its digits is 349920, while the sum is 48.

The square root of 136869591 is about 11699.1277880020. The cubic root of 136869591 is about 515.3500507616.

The spelling of 136869591 in words is "one hundred thirty-six million, eight hundred sixty-nine thousand, five hundred ninety-one".