91141623 has 6 divisors (see below), whose sum is σ = 131649024. Its totient is φ = 60761076.

The previous prime is 91141597. The next prime is 91141627. The reversal of 91141623 is 32614119.

It is not a de Polignac number, because 91141623 - 2⁵ = 91141591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91141627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5063415 + ... + 5063432.

It is an arithmetic number, because the mean of its divisors is an integer number (21941504).

Almost surely, 2^91141623 is an apocalyptic number.

91141623 is a deficient number, since it is larger than the sum of its proper divisors (40507401).

91141623 is a wasteful number, since it uses less digits than its factorization.

91141623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10126853 (or 10126850 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 91141623 is about 9546.8121904644. The cubic root of 91141623 is about 450.0273612993.

The spelling of 91141623 in words is "ninety-one million, one hundred forty-one thousand, six hundred twenty-three".