91642692097 has 4 divisors (see below), whose sum is σ = 99973845936. Its totient is φ = 83311538260.

The previous prime is 91642692059. The next prime is 91642692109. The reversal of 91642692097 is 79029624619.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91642692097 - 2¹¹ = 91642690049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91642692007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4165576903 + ... + 4165576924.

It is an arithmetic number, because the mean of its divisors is an integer number (24993461484).

Almost surely, 2^91642692097 is an apocalyptic number.

It is an amenable number.

91642692097 is a deficient number, since it is larger than the sum of its proper divisors (8331153839).

91642692097 is a wasteful number, since it uses less digits than its factorization.

91642692097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8331153838.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 91642692097 in words is "ninety-one billion, six hundred forty-two million, six hundred ninety-two thousand, ninety-seven".