129496239 has 20 divisors (see below), whose sum is σ = 193980424. Its totient is φ = 86091984.

The previous prime is 129496219. The next prime is 129496243. The reversal of 129496239 is 932694921.

It is a happy number.

129496239 is a `hidden beast` number, since 12 + 9 + 4 + 9 + 623 + 9 = 666.

It is not a de Polignac number, because 129496239 - 2⁸ = 129495983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129496194 and 129496203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129496219) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30144 + ... + 34170.

Almost surely, 2^129496239 is an apocalyptic number.

129496239 is a deficient number, since it is larger than the sum of its proper divisors (64484185).

129496239 is an equidigital number, since it uses as much as digits as its factorization.

129496239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4436 (or 4427 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 129496239 is about 11379.6414266883. The cubic root of 129496239 is about 505.9245084668.

The spelling of 129496239 in words is "one hundred twenty-nine million, four hundred ninety-six thousand, two hundred thirty-nine".