135869657 has 8 divisors (see below), whose sum is σ = 169396032. Its totient is φ = 105872400.

The previous prime is 135869603. The next prime is 135869659. The reversal of 135869657 is 756968531.

It is a happy number.

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 135869657 - 2¹⁰ = 135868633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135869659) 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, 882194 + ... + 882347.

It is an arithmetic number, because the mean of its divisors is an integer number (21174504).

Almost surely, 2^135869657 is an apocalyptic number.

It is an amenable number.

135869657 is a deficient number, since it is larger than the sum of its proper divisors (33526375).

135869657 is a wasteful number, since it uses less digits than its factorization.

135869657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764559.

The product of its digits is 1360800, while the sum is 50.

The square root of 135869657 is about 11656.3140400386. The cubic root of 135869657 is about 514.0919771107.

The spelling of 135869657 in words is "one hundred thirty-five million, eight hundred sixty-nine thousand, six hundred fifty-seven".