129394069 has 8 divisors (see below), whose sum is σ = 151875968. Its totient is φ = 107911440.

The previous prime is 129394063. The next prime is 129394079. The reversal of 129394069 is 960493921.

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

It is not a de Polignac number, because 129394069 - 2³ = 129394061 is a prime.

It is a super-2 number, since 2×129394069² = 33485650184753522, 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 (129394061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249537 + ... + 250054.

It is an arithmetic number, because the mean of its divisors is an integer number (18984496).

Almost surely, 2^129394069 is an apocalyptic number.

It is an amenable number.

129394069 is a deficient number, since it is larger than the sum of its proper divisors (22481899).

129394069 is an equidigital number, since it uses as much as digits as its factorization.

129394069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499635.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 129394069 is about 11375.1513836080. The cubic root of 129394069 is about 505.7914186113.

The spelling of 129394069 in words is "one hundred twenty-nine million, three hundred ninety-four thousand, sixty-nine".