91187134107 has 4 divisors (see below), whose sum is σ = 121582845480. Its totient is φ = 60791422736.

The previous prime is 91187134097. The next prime is 91187134117. The reversal of 91187134107 is 70143178119.

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

It is an interprime number because it is at equal distance from previous prime (91187134097) and next prime (91187134117).

It is a cyclic number.

It is not a de Polignac number, because 91187134107 - 2¹⁰ = 91187133083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91187134117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15197855682 + ... + 15197855687.

It is an arithmetic number, because the mean of its divisors is an integer number (30395711370).

Almost surely, 2^91187134107 is an apocalyptic number.

91187134107 is a deficient number, since it is larger than the sum of its proper divisors (30395711373).

91187134107 is a wasteful number, since it uses less digits than its factorization.

91187134107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30395711372.

The product of its (nonzero) digits is 42336, while the sum is 42.

The spelling of 91187134107 in words is "ninety-one billion, one hundred eighty-seven million, one hundred thirty-four thousand, one hundred seven".