129801233 has 4 divisors (see below), whose sum is σ = 130992180. Its totient is φ = 128610288.

The previous prime is 129801223. The next prime is 129801257. The reversal of 129801233 is 332108921.

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 90763729 + 39037504 = 9527^2 + 6248^2 .

It is a cyclic number.

It is not a de Polignac number, because 129801233 - 2⁸ = 129800977 is a prime.

It is a super-3 number, since 3×129801233³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129801196 and 129801205.

It is not an unprimeable number, because it can be changed into a prime (129801223) 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, 595310 + ... + 595527.

It is an arithmetic number, because the mean of its divisors is an integer number (32748045).

Almost surely, 2^129801233 is an apocalyptic number.

It is an amenable number.

129801233 is a deficient number, since it is larger than the sum of its proper divisors (1190947).

129801233 is a wasteful number, since it uses less digits than its factorization.

129801233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190946.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 129801233 is about 11393.0344070401. The cubic root of 129801233 is about 506.3213873217.

The spelling of 129801233 in words is "one hundred twenty-nine million, eight hundred one thousand, two hundred thirty-three".