129891195 has 40 divisors (see below), whose sum is σ = 266110944. Its totient is φ = 59377536.

The previous prime is 129891193. The next prime is 129891217. The reversal of 129891195 is 591198921.

It is not a de Polignac number, because 129891195 - 2¹ = 129891193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 129891195.

It is not an unprimeable number, because it can be changed into a prime (129891193) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20074 + ... + 25743.

Almost surely, 2^129891195 is an apocalyptic number.

129891195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129891195 is an abundant number, since it is smaller than the sum of its proper divisors (136219749).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129891195 is an equidigital number, since it uses as much as digits as its factorization.

129891195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45841 (or 45832 counting only the distinct ones).

The product of its digits is 58320, while the sum is 45.

The square root of 129891195 is about 11396.9818373111. The cubic root of 129891195 is about 506.4383332205.

The spelling of 129891195 in words is "one hundred twenty-nine million, eight hundred ninety-one thousand, one hundred ninety-five".