96991121 has 2 divisors, whose sum is σ = 96991122. Its totient is φ = 96991120.

The previous prime is 96991093. The next prime is 96991133. The reversal of 96991121 is 12119969.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58736896 + 38254225 = 7664^2 + 6185^2 .

It is a cyclic number.

It is not a de Polignac number, because 96991121 - 2⁶ = 96991057 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (96991421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48495560 + 48495561.

It is an arithmetic number, because the mean of its divisors is an integer number (48495561).

Almost surely, 2^96991121 is an apocalyptic number.

It is an amenable number.

96991121 is a deficient number, since it is larger than the sum of its proper divisors (1).

96991121 is an equidigital number, since it uses as much as digits as its factorization.

96991121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748, while the sum is 38.

The square root of 96991121 is about 9848.4070285504. The cubic root of 96991121 is about 459.4560694289.

The spelling of 96991121 in words is "ninety-six million, nine hundred ninety-one thousand, one hundred twenty-one".