129004994 has 8 divisors (see below), whose sum is σ = 194206908. Its totient is φ = 64269360.

The previous prime is 129004957. The next prime is 129005011. The reversal of 129004994 is 499400921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 120670225 + 8334769 = 10985^2 + 2887^2 .

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

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, 115877 + ... + 116984.

Almost surely, 2^129004994 is an apocalyptic number.

129004994 is a deficient number, since it is larger than the sum of its proper divisors (65201914).

129004994 is a wasteful number, since it uses less digits than its factorization.

129004994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233140.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 129004994 is about 11358.0365380641. The cubic root of 129004994 is about 505.2839549352.

The spelling of 129004994 in words is "one hundred twenty-nine million, four thousand, nine hundred ninety-four".