129736534 has 16 divisors (see below), whose sum is σ = 197971488. Its totient is φ = 63755712.

The previous prime is 129736531. The next prime is 129736567. The reversal of 129736534 is 435637921.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129736531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25924 + ... + 30520.

It is an arithmetic number, because the mean of its divisors is an integer number (12373218).

Almost surely, 2^129736534 is an apocalyptic number.

129736534 is a deficient number, since it is larger than the sum of its proper divisors (68234954).

129736534 is a wasteful number, since it uses less digits than its factorization.

129736534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4839.

The product of its digits is 136080, while the sum is 40.

The square root of 129736534 is about 11390.1946427618. The cubic root of 129736534 is about 506.2372485941.

The spelling of 129736534 in words is "one hundred twenty-nine million, seven hundred thirty-six thousand, five hundred thirty-four".