91342687 has 4 divisors (see below), whose sum is σ = 91362816. Its totient is φ = 91322560.

The previous prime is 91342673. The next prime is 91342697. The reversal of 91342687 is 78624319.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91342687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91342627) 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, 303 + ... + 13519.

It is an arithmetic number, because the mean of its divisors is an integer number (22840704).

Almost surely, 2^91342687 is an apocalyptic number.

91342687 is a deficient number, since it is larger than the sum of its proper divisors (20129).

91342687 is a wasteful number, since it uses less digits than its factorization.

91342687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20128.

The product of its digits is 72576, while the sum is 40.

The square root of 91342687 is about 9557.3368152430. The cubic root of 91342687 is about 450.3580475502.

It can be divided in two parts, 91342 and 687, that added together give a palindrome (92029).

The spelling of 91342687 in words is "ninety-one million, three hundred forty-two thousand, six hundred eighty-seven".