129528093 has 4 divisors (see below), whose sum is σ = 172704128. Its totient is φ = 86352060.

The previous prime is 129528089. The next prime is 129528103. The reversal of 129528093 is 390825921.

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, and also an emirpimes, since its reverse is a distinct semiprime: 390825921 = 3 ⋅130275307.

It is not a de Polignac number, because 129528093 - 2² = 129528089 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 (129528023) 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, 21588013 + ... + 21588018.

It is an arithmetic number, because the mean of its divisors is an integer number (43176032).

Almost surely, 2^129528093 is an apocalyptic number.

It is an amenable number.

129528093 is a deficient number, since it is larger than the sum of its proper divisors (43176035).

129528093 is an equidigital number, since it uses as much as digits as its factorization.

129528093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43176034.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 129528093 is about 11381.0409453617. The cubic root of 129528093 is about 505.9659881736.

The spelling of 129528093 in words is "one hundred twenty-nine million, five hundred twenty-eight thousand, ninety-three".