129782494 has 8 divisors (see below), whose sum is σ = 194739120. Its totient is φ = 64869456.

The previous prime is 129782489. The next prime is 129782501. The reversal of 129782494 is 494287921.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1999 + ... + 16234.

It is an arithmetic number, because the mean of its divisors is an integer number (24342390).

Almost surely, 2^129782494 is an apocalyptic number.

129782494 is a deficient number, since it is larger than the sum of its proper divisors (64956626).

129782494 is a wasteful number, since it uses less digits than its factorization.

129782494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21794.

The product of its digits is 290304, while the sum is 46.

The square root of 129782494 is about 11392.2119888984. The cubic root of 129782494 is about 506.2970208015.

The spelling of 129782494 in words is "one hundred twenty-nine million, seven hundred eighty-two thousand, four hundred ninety-four".