201209947929 has 6 divisors (see below), whose sum is σ = 290636591466. Its totient is φ = 134139965280.

The previous prime is 201209947903. The next prime is 201209948021. The reversal of 201209947929 is 929749902102.

201209947929 is a `hidden beast` number, since 20 + 120 + 9 + 9 + 479 + 29 = 666.

It can be written as a sum of positive squares in only one way, i.e., 174868657929 + 26341290000 = 418173^2 + 162300^2 .

It is not a de Polignac number, because 201209947929 - 2¹⁵ = 201209915161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201209942929) 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, 11178330432 + ... + 11178330449.

It is an arithmetic number, because the mean of its divisors is an integer number (48439431911).

Almost surely, 2^201209947929 is an apocalyptic number.

It is an amenable number.

201209947929 is a deficient number, since it is larger than the sum of its proper divisors (89426643537).

201209947929 is a wasteful number, since it uses less digits than its factorization.

201209947929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22356660887 (or 22356660884 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The spelling of 201209947929 in words is "two hundred one billion, two hundred nine million, nine hundred forty-seven thousand, nine hundred twenty-nine".