135891534 has 48 divisors (see below), whose sum is σ = 291271680. Its totient is φ = 42148080.

The previous prime is 135891527. The next prime is 135891541. The reversal of 135891534 is 435198531.

It is an interprime number because it is at equal distance from previous prime (135891527) and next prime (135891541).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 135891492 and 135891501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 711379 + ... + 711569.

It is an arithmetic number, because the mean of its divisors is an integer number (6068160).

Almost surely, 2^135891534 is an apocalyptic number.

135891534 is an abundant number, since it is smaller than the sum of its proper divisors (155380146).

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

135891534 is a wasteful number, since it uses less digits than its factorization.

135891534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373 (or 294 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 135891534 is about 11657.2524207036. The cubic root of 135891534 is about 514.1195677365.

The spelling of 135891534 in words is "one hundred thirty-five million, eight hundred ninety-one thousand, five hundred thirty-four".