129361193 has 4 divisors (see below), whose sum is σ = 139312068. Its totient is φ = 119410320.

The previous prime is 129361189. The next prime is 129361229. The reversal of 129361193 is 391163921.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17572864 + 111788329 = 4192^2 + 10573^2 .

It is a cyclic number.

It is not a de Polignac number, because 129361193 - 2² = 129361189 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129361123) 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, 4975418 + ... + 4975443.

It is an arithmetic number, because the mean of its divisors is an integer number (34828017).

Almost surely, 2^129361193 is an apocalyptic number.

129361193 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

129361193 is a deficient number, since it is larger than the sum of its proper divisors (9950875).

129361193 is an equidigital number, since it uses as much as digits as its factorization.

129361193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9950874.

The product of its digits is 8748, while the sum is 35.

The square root of 129361193 is about 11373.7062121368. The cubic root of 129361193 is about 505.7485784015.

The spelling of 129361193 in words is "one hundred twenty-nine million, three hundred sixty-one thousand, one hundred ninety-three".