135444587 has 8 divisors (see below), whose sum is σ = 142208400. Its totient is φ = 128820384.

The previous prime is 135444581. The next prime is 135444601. The reversal of 135444587 is 785444531.

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 135444587 - 2⁶ = 135444523 is a prime.

It is a super-2 number, since 2×135444587² = 36690472295201138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135444581) 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, 32912 + ... + 36797.

It is an arithmetic number, because the mean of its divisors is an integer number (17776050).

Almost surely, 2^135444587 is an apocalyptic number.

135444587 is a deficient number, since it is larger than the sum of its proper divisors (6763813).

135444587 is an equidigital number, since it uses as much as digits as its factorization.

135444587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69805.

The product of its digits is 268800, while the sum is 41.

The square root of 135444587 is about 11638.0662912702. The cubic root of 135444587 is about 513.5553025639. Note that the first 3 decimals are identical.

The spelling of 135444587 in words is "one hundred thirty-five million, four hundred forty-four thousand, five hundred eighty-seven".