91140141 has 4 divisors (see below), whose sum is σ = 121520192. Its totient is φ = 60760092.

The previous prime is 91140121. The next prime is 91140143. The reversal of 91140141 is 14104119.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14104119 = 3 ⋅4701373.

It is not a de Polignac number, because 91140141 - 2¹⁰ = 91139117 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 (91140143) 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, 15190021 + ... + 15190026.

It is an arithmetic number, because the mean of its divisors is an integer number (30380048).

Almost surely, 2^91140141 is an apocalyptic number.

It is an amenable number.

91140141 is a deficient number, since it is larger than the sum of its proper divisors (30380051).

91140141 is a wasteful number, since it uses less digits than its factorization.

91140141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30380050.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 91140141 is about 9546.7345726170. The cubic root of 91140141 is about 450.0249220765.

The spelling of 91140141 in words is "ninety-one million, one hundred forty thousand, one hundred forty-one".