91007676691 has 4 divisors (see below), whose sum is σ = 91014405192. Its totient is φ = 91000948192.

The previous prime is 91007676689. The next prime is 91007676703. The reversal of 91007676691 is 19667670019.

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

It is a cyclic number.

It is not a de Polignac number, because 91007676691 - 2¹ = 91007676689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91007676601) 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, 3343921 + ... + 3371026.

It is an arithmetic number, because the mean of its divisors is an integer number (22753601298).

Almost surely, 2^91007676691 is an apocalyptic number.

91007676691 is a deficient number, since it is larger than the sum of its proper divisors (6728501).

91007676691 is a wasteful number, since it uses less digits than its factorization.

91007676691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6728500.

The product of its (nonzero) digits is 857304, while the sum is 52.

The spelling of 91007676691 in words is "ninety-one billion, seven million, six hundred seventy-six thousand, six hundred ninety-one".