135123879 has 8 divisors (see below), whose sum is σ = 196543872. Its totient is φ = 81893240.

The previous prime is 135123869. The next prime is 135123881. The reversal of 135123879 is 978321531.

135123879 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 not a de Polignac number, because 135123879 - 2¹⁵ = 135091111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135123869) 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, 2047299 + ... + 2047364.

It is an arithmetic number, because the mean of its divisors is an integer number (24567984).

Almost surely, 2^135123879 is an apocalyptic number.

135123879 is a deficient number, since it is larger than the sum of its proper divisors (61419993).

135123879 is a wasteful number, since it uses less digits than its factorization.

135123879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4094677.

The product of its digits is 45360, while the sum is 39.

The square root of 135123879 is about 11624.2797196213. The cubic root of 135123879 is about 513.1496472252.

It can be divided in two parts, 13512 and 3879, that added together give a triangular number (17391 = T₁₈₆).

The spelling of 135123879 in words is "one hundred thirty-five million, one hundred twenty-three thousand, eight hundred seventy-nine".