129906119 has 4 divisors (see below), whose sum is σ = 148464144. Its totient is φ = 111348096.

The previous prime is 129906113. The next prime is 129906131. The reversal of 129906119 is 911609921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129906119 - 2¹² = 129902023 is a prime.

It is a super-2 number, since 2×129906119² = 33751199507284322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129906113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9279002 + ... + 9279015.

It is an arithmetic number, because the mean of its divisors is an integer number (37116036).

Almost surely, 2^129906119 is an apocalyptic number.

129906119 is a deficient number, since it is larger than the sum of its proper divisors (18558025).

129906119 is an equidigital number, since it uses as much as digits as its factorization.

129906119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18558024.

The product of its (nonzero) digits is 8748, while the sum is 38.

The square root of 129906119 is about 11397.6365532509. The cubic root of 129906119 is about 506.4577284182.

The spelling of 129906119 in words is "one hundred twenty-nine million, nine hundred six thousand, one hundred nineteen".