129280633 has 4 divisors (see below), whose sum is σ = 133451008. Its totient is φ = 125110260.

The previous prime is 129280607. The next prime is 129280687. The reversal of 129280633 is 336082921.

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, and also an emirpimes, since its reverse is a distinct semiprime: 336082921 = 67 ⋅5016163.

It is a cyclic number.

It is not a de Polignac number, because 129280633 - 2⁵ = 129280601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129280603) 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, 2085141 + ... + 2085202.

It is an arithmetic number, because the mean of its divisors is an integer number (33362752).

Almost surely, 2^129280633 is an apocalyptic number.

It is an amenable number.

129280633 is a deficient number, since it is larger than the sum of its proper divisors (4170375).

129280633 is an equidigital number, since it uses as much as digits as its factorization.

129280633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4170374.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 129280633 is about 11370.1641588853. The cubic root of 129280633 is about 505.6435712117.

The spelling of 129280633 in words is "one hundred twenty-nine million, two hundred eighty thousand, six hundred thirty-three".