129944398 has 4 divisors (see below), whose sum is σ = 194916600. Its totient is φ = 64972198.

The previous prime is 129944383. The next prime is 129944429. The reversal of 129944398 is 893449921.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32486098 + ... + 32486101.

It is an arithmetic number, because the mean of its divisors is an integer number (48729150).

Almost surely, 2^129944398 is an apocalyptic number.

129944398 is a deficient number, since it is larger than the sum of its proper divisors (64972202).

129944398 is an equidigital number, since it uses as much as digits as its factorization.

129944398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64972201.

The product of its digits is 559872, while the sum is 49.

The square root of 129944398 is about 11399.3156812153. The cubic root of 129944398 is about 506.5074689325.

The spelling of 129944398 in words is "one hundred twenty-nine million, nine hundred forty-four thousand, three hundred ninety-eight".