91007699 has 2 divisors, whose sum is σ = 91007700. Its totient is φ = 91007698.

The previous prime is 91007689. The next prime is 91007747. The reversal of 91007699 is 99670019.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (99670019) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91007699 is a prime.

It is not a weakly prime, because it can be changed into another prime (91007629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45503849 + 45503850.

It is an arithmetic number, because the mean of its divisors is an integer number (45503850).

Almost surely, 2^91007699 is an apocalyptic number.

91007699 is a deficient number, since it is larger than the sum of its proper divisors (1).

91007699 is an equidigital number, since it uses as much as digits as its factorization.

91007699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 91007699 is about 9539.7955428825. The cubic root of 91007699 is about 449.8068290237.

The spelling of 91007699 in words is "ninety-one million, seven thousand, six hundred ninety-nine".