220129929 has 6 divisors (see below), whose sum is σ = 317965466. Its totient is φ = 146753280.

The previous prime is 220129919. The next prime is 220129933. The reversal of 220129929 is 929921022.

It can be written as a sum of positive squares in only one way, i.e., 116640000 + 103489929 = 10800^2 + 10173^2 .

It is not a de Polignac number, because 220129929 - 2⁴ = 220129913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220129893 and 220129902.

It is not an unprimeable number, because it can be changed into a prime (220129919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12229432 + ... + 12229449.

Almost surely, 2^220129929 is an apocalyptic number.

It is an amenable number.

220129929 is a deficient number, since it is larger than the sum of its proper divisors (97835537).

220129929 is a wasteful number, since it uses less digits than its factorization.

220129929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24458887 (or 24458884 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 220129929 is about 14836.7762334006. The cubic root of 220129929 is about 603.7998922287.

The spelling of 220129929 in words is "two hundred twenty million, one hundred twenty-nine thousand, nine hundred twenty-nine".