129446938 has 4 divisors (see below), whose sum is σ = 194170410. Its totient is φ = 64723468.

The previous prime is 129446903. The next prime is 129446957. The reversal of 129446938 is 839644921.

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

It can be written as a sum of positive squares in only one way, i.e., 65334889 + 64112049 = 8083^2 + 8007^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32361733 + ... + 32361736.

Almost surely, 2^129446938 is an apocalyptic number.

129446938 is a deficient number, since it is larger than the sum of its proper divisors (64723472).

129446938 is an equidigital number, since it uses as much as digits as its factorization.

129446938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64723471.

The product of its digits is 373248, while the sum is 46.

The square root of 129446938 is about 11377.4750274391. The cubic root of 129446938 is about 505.8602961767.

The spelling of 129446938 in words is "one hundred twenty-nine million, four hundred forty-six thousand, nine hundred thirty-eight".