135987654 has 64 divisors (see below), whose sum is σ = 307307520. Its totient is φ = 39755520.

The previous prime is 135987619. The next prime is 135987659. The reversal of 135987654 is 456789531.

Its product of digits (907200) is a multiple of the sum of its prime divisors (525).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135987659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 568867 + ... + 569105.

It is an arithmetic number, because the mean of its divisors is an integer number (4801680).

Almost surely, 2^135987654 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135987654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153653760).

135987654 is an abundant number, since it is smaller than the sum of its proper divisors (171319866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135987654 is a wasteful number, since it uses less digits than its factorization.

135987654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525.

The product of its digits is 907200, while the sum is 48.

The square root of 135987654 is about 11661.3744472939. The cubic root of 135987654 is about 514.2407563654.

It can be divided in two parts, 135 and 987654, that added together give a palindrome (987789).

The spelling of 135987654 in words is "one hundred thirty-five million, nine hundred eighty-seven thousand, six hundred fifty-four".