91520948699 has 2 divisors, whose sum is σ = 91520948700. Its totient is φ = 91520948698.

The previous prime is 91520948639. The next prime is 91520948747. The reversal of 91520948699 is 99684902519.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91520948699 - 2¹⁶ = 91520883163 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (91520948609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45760474349 + 45760474350.

It is an arithmetic number, because the mean of its divisors is an integer number (45760474350).

Almost surely, 2^91520948699 is an apocalyptic number.

91520948699 is a deficient number, since it is larger than the sum of its proper divisors (1).

91520948699 is an equidigital number, since it uses as much as digits as its factorization.

91520948699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12597120, while the sum is 62.

The spelling of 91520948699 in words is "ninety-one billion, five hundred twenty million, nine hundred forty-eight thousand, six hundred ninety-nine".