129320417 has 4 divisors (see below), whose sum is σ = 130338816. Its totient is φ = 128302020.

The previous prime is 129320407. The next prime is 129320447. The reversal of 129320417 is 714023921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129320417 - 2¹⁴ = 129304033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129320417.

It is not an unprimeable number, because it can be changed into a prime (129320407) 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, 509009 + ... + 509262.

It is an arithmetic number, because the mean of its divisors is an integer number (32584704).

Almost surely, 2^129320417 is an apocalyptic number.

It is an amenable number.

129320417 is a deficient number, since it is larger than the sum of its proper divisors (1018399).

129320417 is a wasteful number, since it uses less digits than its factorization.

129320417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018398.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 129320417 is about 11371.9135153236. The cubic root of 129320417 is about 505.6954337380.

The spelling of 129320417 in words is "one hundred twenty-nine million, three hundred twenty thousand, four hundred seventeen".