129084917 has 16 divisors (see below), whose sum is σ = 147342720. Its totient is φ = 112104000.

The previous prime is 129084913. The next prime is 129084919. The reversal of 129084917 is 719480921.

It is a cyclic number.

It is not a de Polignac number, because 129084917 - 2² = 129084913 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129084913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35567 + ... + 39027.

It is an arithmetic number, because the mean of its divisors is an integer number (9208920).

Almost surely, 2^129084917 is an apocalyptic number.

It is an amenable number.

129084917 is a deficient number, since it is larger than the sum of its proper divisors (18257803).

129084917 is a wasteful number, since it uses less digits than its factorization.

129084917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3644.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 129084917 is about 11361.5543390858. The cubic root of 129084917 is about 505.3882802832.

The spelling of 129084917 in words is "one hundred twenty-nine million, eighty-four thousand, nine hundred seventeen".