129284906 has 4 divisors (see below), whose sum is σ = 193927362. Its totient is φ = 64642452.

The previous prime is 129284893. The next prime is 129284923. The reversal of 129284906 is 609482921.

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., 91030681 + 38254225 = 9541^2 + 6185^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32321225 + ... + 32321228.

Almost surely, 2^129284906 is an apocalyptic number.

129284906 is a deficient number, since it is larger than the sum of its proper divisors (64642456).

129284906 is an equidigital number, since it uses as much as digits as its factorization.

129284906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64642455.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 129284906 is about 11370.3520613919. The cubic root of 129284906 is about 505.6491420157.

The spelling of 129284906 in words is "one hundred twenty-nine million, two hundred eighty-four thousand, nine hundred six".