129835853 has 4 divisors (see below), whose sum is σ = 148383840. Its totient is φ = 111287868.

The previous prime is 129835847. The next prime is 129835861. The reversal of 129835853 is 358538921.

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: 358538921 = 13 ⋅27579917.

It is a cyclic number.

It is not a de Polignac number, because 129835853 - 2¹⁶ = 129770317 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 (129855853) 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, 9273983 + ... + 9273996.

It is an arithmetic number, because the mean of its divisors is an integer number (37095960).

Almost surely, 2^129835853 is an apocalyptic number.

It is an amenable number.

129835853 is a deficient number, since it is larger than the sum of its proper divisors (18547987).

129835853 is an equidigital number, since it uses as much as digits as its factorization.

129835853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18547986.

The product of its digits is 259200, while the sum is 44.

The square root of 129835853 is about 11394.5536551460. The cubic root of 129835853 is about 506.3663979066.

The spelling of 129835853 in words is "one hundred twenty-nine million, eight hundred thirty-five thousand, eight hundred fifty-three".