129839853 has 32 divisors (see below), whose sum is σ = 212244480. Its totient is φ = 69474240.

The previous prime is 129839849. The next prime is 129839861. The reversal of 129839853 is 358938921.

It is a happy number.

It is not a de Polignac number, because 129839853 - 2² = 129839849 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129839653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3288 + ... + 16446.

It is an arithmetic number, because the mean of its divisors is an integer number (6632640).

Almost surely, 2^129839853 is an apocalyptic number.

129839853 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

129839853 is a deficient number, since it is larger than the sum of its proper divisors (82404627).

129839853 is a wasteful number, since it uses less digits than its factorization.

129839853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13209.

The product of its digits is 466560, while the sum is 48.

The square root of 129839853 is about 11394.7291762464. The cubic root of 129839853 is about 506.3715979207.

The spelling of 129839853 in words is "one hundred twenty-nine million, eight hundred thirty-nine thousand, eight hundred fifty-three".