129609854 has 8 divisors (see below), whose sum is σ = 212088888. Its totient is φ = 58913560.

The previous prime is 129609841. The next prime is 129609859. The reversal of 129609854 is 458906921.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129609859) by changing a digit.

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, 2945657 + ... + 2945700.

It is an arithmetic number, because the mean of its divisors is an integer number (26511111).

Almost surely, 2^129609854 is an apocalyptic number.

129609854 is a deficient number, since it is larger than the sum of its proper divisors (82479034).

129609854 is a wasteful number, since it uses less digits than its factorization.

129609854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5891370.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 129609854 is about 11384.6323612140. The cubic root of 129609854 is about 506.0724247595.

The spelling of 129609854 in words is "one hundred twenty-nine million, six hundred nine thousand, eight hundred fifty-four".