135489479 has 16 divisors (see below), whose sum is σ = 143562240. Its totient is φ = 127680000.

The previous prime is 135489469. The next prime is 135489491. The reversal of 135489479 is 974984531.

135489479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135489479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135489469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337679 + ... + 338079.

It is an arithmetic number, because the mean of its divisors is an integer number (8972640).

Almost surely, 2^135489479 is an apocalyptic number.

135489479 is a deficient number, since it is larger than the sum of its proper divisors (8072761).

135489479 is a wasteful number, since it uses less digits than its factorization.

135489479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682.

The product of its digits is 1088640, while the sum is 50.

The square root of 135489479 is about 11639.9948024043. The cubic root of 135489479 is about 513.6120341974.

The spelling of 135489479 in words is "one hundred thirty-five million, four hundred eighty-nine thousand, four hundred seventy-nine".