129395819 has 12 divisors (see below), whose sum is σ = 150719400. Its totient is φ = 110765088.

The previous prime is 129395813. The next prime is 129395821. The reversal of 129395819 is 918593921.

It is not a de Polignac number, because 129395819 - 2¹² = 129391723 is a prime.

It is a super-2 number, since 2×129395819² = 33486555949361522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129395813) 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 11 ways as a sum of consecutive naturals, for example, 54152 + ... + 56490.

It is an arithmetic number, because the mean of its divisors is an integer number (12559950).

Almost surely, 2^129395819 is an apocalyptic number.

129395819 is a deficient number, since it is larger than the sum of its proper divisors (21323581).

129395819 is a wasteful number, since it uses less digits than its factorization.

129395819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3482 (or 3475 counting only the distinct ones).

The product of its digits is 174960, while the sum is 47.

The square root of 129395819 is about 11375.2283054012. The cubic root of 129395819 is about 505.7936988059.

The spelling of 129395819 in words is "one hundred twenty-nine million, three hundred ninety-five thousand, eight hundred nineteen".