3800120129 has 4 divisors (see below), whose sum is σ = 4092437076. Its totient is φ = 3507803184.

The previous prime is 3800120101. The next prime is 3800120161. The reversal of 3800120129 is 9210210083.

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 1312105729 + 2488014400 = 36223^2 + 49880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3800120129 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3800120098 and 3800120107.

It is not an unprimeable number, because it can be changed into a prime (3800122129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146158454 + ... + 146158479.

It is an arithmetic number, because the mean of its divisors is an integer number (1023109269).

Almost surely, 2^3800120129 is an apocalyptic number.

It is an amenable number.

3800120129 is a deficient number, since it is larger than the sum of its proper divisors (292316947).

3800120129 is a wasteful number, since it uses less digits than its factorization.

3800120129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292316946.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 3800120129 is about 61645.1143968441. The cubic root of 3800120129 is about 1560.5071944112.

The spelling of 3800120129 in words is "three billion, eight hundred million, one hundred twenty thousand, one hundred twenty-nine".