129092605 has 4 divisors (see below), whose sum is σ = 154911132. Its totient is φ = 103274080.

The previous prime is 129092603. The next prime is 129092609. The reversal of 129092605 is 506290921.

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 78198649 + 50893956 = 8843^2 + 7134^2 .

It is not a de Polignac number, because 129092605 - 2¹ = 129092603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129092603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12909256 + ... + 12909265.

It is an arithmetic number, because the mean of its divisors is an integer number (38727783).

Almost surely, 2^129092605 is an apocalyptic number.

It is an amenable number.

129092605 is a deficient number, since it is larger than the sum of its proper divisors (25818527).

129092605 is an equidigital number, since it uses as much as digits as its factorization.

129092605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25818526.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 129092605 is about 11361.8926680373. The cubic root of 129092605 is about 505.3983133376.

The spelling of 129092605 in words is "one hundred twenty-nine million, ninety-two thousand, six hundred five".