91699479329 has 4 divisors (see below), whose sum is σ = 92644834884. Its totient is φ = 90754123776.

The previous prime is 91699479307. The next prime is 91699479331. The reversal of 91699479329 is 92397499619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92397499619 = 142607 ⋅647917.

It can be written as a sum of positive squares in 2 ways, for example, as 37422128704 + 54277350625 = 193448^2 + 232975^2 .

It is a cyclic number.

It is not a de Polignac number, because 91699479329 - 2⁸ = 91699479073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91699476329) 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 in 3 ways as a sum of consecutive naturals, for example, 472677632 + ... + 472677825.

It is an arithmetic number, because the mean of its divisors is an integer number (23161208721).

Almost surely, 2^91699479329 is an apocalyptic number.

It is an amenable number.

91699479329 is a deficient number, since it is larger than the sum of its proper divisors (945355555).

91699479329 is an equidigital number, since it uses as much as digits as its factorization.

91699479329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945355554.

The product of its digits is 59521392, while the sum is 68.

The spelling of 91699479329 in words is "ninety-one billion, six hundred ninety-nine million, four hundred seventy-nine thousand, three hundred twenty-nine".