129436493 has 8 divisors (see below), whose sum is σ = 139418400. Its totient is φ = 119771568.

The previous prime is 129436481. The next prime is 129436513. The reversal of 129436493 is 394634921.

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

It is a cyclic number.

It is not a de Polignac number, because 129436493 - 2⁴ = 129436477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 129436493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129436403) 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, 78398 + ... + 80031.

It is an arithmetic number, because the mean of its divisors is an integer number (17427300).

Almost surely, 2^129436493 is an apocalyptic number.

It is an amenable number.

129436493 is a deficient number, since it is larger than the sum of its proper divisors (9981907).

129436493 is a wasteful number, since it uses less digits than its factorization.

129436493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158491.

The product of its digits is 139968, while the sum is 41.

The square root of 129436493 is about 11377.0159971761. The cubic root of 129436493 is about 505.8466899506.

The spelling of 129436493 in words is "one hundred twenty-nine million, four hundred thirty-six thousand, four hundred ninety-three".