91279099 has 2 divisors, whose sum is σ = 91279100. Its totient is φ = 91279098.

The previous prime is 91279073. The next prime is 91279117. The reversal of 91279099 is 99097219.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91279099 is a prime.

It is not a weakly prime, because it can be changed into another prime (91279009) 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, 45639549 + 45639550.

It is an arithmetic number, because the mean of its divisors is an integer number (45639550).

Almost surely, 2^91279099 is an apocalyptic number.

91279099 is a deficient number, since it is larger than the sum of its proper divisors (1).

91279099 is an equidigital number, since it uses as much as digits as its factorization.

91279099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 46.

The square root of 91279099 is about 9554.0095771357. The cubic root of 91279099 is about 450.2535180532.

The spelling of 91279099 in words is "ninety-one million, two hundred seventy-nine thousand, ninety-nine".