96991091 has 2 divisors, whose sum is σ = 96991092. Its totient is φ = 96991090.

The previous prime is 96991087. The next prime is 96991093. The reversal of 96991091 is 19019969.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 96991091 - 2² = 96991087 is a prime.

It is a Sophie Germain prime.

Together with 96991093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (96991093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48495545 + 48495546.

It is an arithmetic number, because the mean of its divisors is an integer number (48495546).

Almost surely, 2^96991091 is an apocalyptic number.

96991091 is a deficient number, since it is larger than the sum of its proper divisors (1).

96991091 is an equidigital number, since it uses as much as digits as its factorization.

96991091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39366, while the sum is 44.

The square root of 96991091 is about 9848.4055054613. The cubic root of 96991091 is about 459.4560220580.

The spelling of 96991091 in words is "ninety-six million, nine hundred ninety-one thousand, ninety-one".