9927961 has 2 divisors, whose sum is σ = 9927962. Its totient is φ = 9927960.

The previous prime is 9927959. The next prime is 9927991. The reversal of 9927961 is 1697299.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5433561 + 4494400 = 2331^2 + 2120^2 .

It is an emirp because it is prime and its reverse (1697299) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9927961 - 2¹ = 9927959 is a prime.

Together with 9927959, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9927941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4963980 + 4963981.

It is an arithmetic number, because the mean of its divisors is an integer number (4963981).

Almost surely, 2^9927961 is an apocalyptic number.

It is an amenable number.

9927961 is a deficient number, since it is larger than the sum of its proper divisors (1).

9927961 is an equidigital number, since it uses as much as digits as its factorization.

9927961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61236, while the sum is 43.

The square root of 9927961 is about 3150.8667061620. The cubic root of 9927961 is about 214.9248773061.

The spelling of 9927961 in words is "nine million, nine hundred twenty-seven thousand, nine hundred sixty-one".