129530933 has 4 divisors (see below), whose sum is σ = 148035360. Its totient is φ = 111026508.

The previous prime is 129530911. The next prime is 129530953. The reversal of 129530933 is 339035921.

It is a happy number.

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 129530933 - 2⁸ = 129530677 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129530893 and 129530902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129530953) 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, 9252203 + ... + 9252216.

It is an arithmetic number, because the mean of its divisors is an integer number (37008840).

Almost surely, 2^129530933 is an apocalyptic number.

It is an amenable number.

129530933 is a deficient number, since it is larger than the sum of its proper divisors (18504427).

129530933 is an equidigital number, since it uses as much as digits as its factorization.

129530933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18504426.

The product of its (nonzero) digits is 21870, while the sum is 35.

The square root of 129530933 is about 11381.1657135814. The cubic root of 129530933 is about 505.9696860404.

The spelling of 129530933 in words is "one hundred twenty-nine million, five hundred thirty thousand, nine hundred thirty-three".