129493138 has 8 divisors (see below), whose sum is σ = 200505600. Its totient is φ = 62657940.

The previous prime is 129493123. The next prime is 129493153. The reversal of 129493138 is 831394921.

It is an interprime number because it is at equal distance from previous prime (129493123) and next prime (129493153).

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

It is a self number, because there is not a number n which added to its sum of digits gives 129493138.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1044238 + ... + 1044361.

It is an arithmetic number, because the mean of its divisors is an integer number (25063200).

Almost surely, 2^129493138 is an apocalyptic number.

129493138 is a deficient number, since it is larger than the sum of its proper divisors (71012462).

129493138 is a wasteful number, since it uses less digits than its factorization.

129493138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088632.

The product of its digits is 46656, while the sum is 40.

The square root of 129493138 is about 11379.5051737762. The cubic root of 129493138 is about 505.9204700369.

The spelling of 129493138 in words is "one hundred twenty-nine million, four hundred ninety-three thousand, one hundred thirty-eight".