91541667 has 16 divisors (see below), whose sum is σ = 143992832. Its totient is φ = 50621760.

The previous prime is 91541657. The next prime is 91541683. The reversal of 91541667 is 76614519.

It is not a de Polignac number, because 91541667 - 2¹¹ = 91539619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91541657) 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 15 ways as a sum of consecutive naturals, for example, 69658 + ... + 70959.

It is an arithmetic number, because the mean of its divisors is an integer number (8999552).

Almost surely, 2^91541667 is an apocalyptic number.

91541667 is a deficient number, since it is larger than the sum of its proper divisors (52451165).

91541667 is a wasteful number, since it uses less digits than its factorization.

91541667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140658.

The product of its digits is 45360, while the sum is 39.

The square root of 91541667 is about 9567.7409559415. The cubic root of 91541667 is about 450.6848288749.

The spelling of 91541667 in words is "ninety-one million, five hundred forty-one thousand, six hundred sixty-seven".