9797621261 has 8 divisors (see below), whose sum is σ = 10187991480. Its totient is φ = 9410752512.

The previous prime is 9797621257. The next prime is 9797621291. The reversal of 9797621261 is 1621267979.

It can be written as a sum of positive squares in 4 ways, for example, as 17598025 + 9780023236 = 4195^2 + 98894^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9797621261 - 2² = 9797621257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9797621221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 869660 + ... + 880853.

It is an arithmetic number, because the mean of its divisors is an integer number (1273498935).

Almost surely, 2^9797621261 is an apocalyptic number.

It is an amenable number.

9797621261 is a deficient number, since it is larger than the sum of its proper divisors (390370219).

9797621261 is a wasteful number, since it uses less digits than its factorization.

9797621261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750735.

The product of its digits is 571536, while the sum is 50.

The square root of 9797621261 is about 98982.9341906977. The cubic root of 9797621261 is about 2139.8018028370.

The spelling of 9797621261 in words is "nine billion, seven hundred ninety-seven million, six hundred twenty-one thousand, two hundred sixty-one".