147639609121 has 9 divisors (see below), whose sum is σ = 150123440883. Its totient is φ = 145196233320.

The previous prime is 147639609109. The next prime is 147639609151. The reversal of 147639609121 is 121906936741.

The square root of 147639609121 is 384239.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4800965521 + 142838643600 = 69289^2 + 377940^2 .

It is not a de Polignac number, because 147639609121 - 2²¹ = 147637511969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147639609151) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 23435430 + ... + 23441728.

Almost surely, 2^147639609121 is an apocalyptic number.

147639609121 is the 384239-th square number.

147639609121 is the 192120-th centered octagonal number.

It is an amenable number.

147639609121 is a deficient number, since it is larger than the sum of its proper divisors (2483831762).

147639609121 is an frugal number, since it uses more digits than its factorization.

147639609121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12720 (or 6360 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 49.

Multiplying 147639609121 by its sum of digits (49), we get a square (7234340846929 = 2689673²).

The spelling of 147639609121 in words is "one hundred forty-seven billion, six hundred thirty-nine million, six hundred nine thousand, one hundred twenty-one".