9727272261 has 28 divisors (see below), whose sum is σ = 16667707872. Its totient is φ = 5558438376.

The previous prime is 9727272259. The next prime is 9727272277. The reversal of 9727272261 is 1622727279.

It is not a de Polignac number, because 9727272261 - 2¹ = 9727272259 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9727272461) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 947991 + ... + 958196.

Almost surely, 2^9727272261 is an apocalyptic number.

It is an amenable number.

9727272261 is a deficient number, since it is larger than the sum of its proper divisors (6940435611).

9727272261 is an equidigital number, since it uses as much as digits as its factorization.

9727272261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906212 (or 1906197 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The square root of 9727272261 is about 98626.9347642925. The cubic root of 9727272261 is about 2134.6680857436.

The spelling of 9727272261 in words is "nine billion, seven hundred twenty-seven million, two hundred seventy-two thousand, two hundred sixty-one".