129436534 has 8 divisors (see below), whose sum is σ = 194424048. Its totient is φ = 64628520.

The previous prime is 129436513. The next prime is 129436553. The reversal of 129436534 is 435634921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 129436493 and 129436502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43057 + ... + 45964.

It is an arithmetic number, because the mean of its divisors is an integer number (24303006).

Almost surely, 2^129436534 is an apocalyptic number.

129436534 is a deficient number, since it is larger than the sum of its proper divisors (64987514).

129436534 is an equidigital number, since it uses as much as digits as its factorization.

129436534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89750.

The product of its digits is 77760, while the sum is 37.

The square root of 129436534 is about 11377.0177990544. The cubic root of 129436534 is about 505.8467433609.

The spelling of 129436534 in words is "one hundred twenty-nine million, four hundred thirty-six thousand, five hundred thirty-four".