91174121 has 4 divisors (see below), whose sum is σ = 91193232. Its totient is φ = 91155012.

The previous prime is 91174087. The next prime is 91174123. The reversal of 91174121 is 12147119.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 91174121 - 2¹⁰ = 91173097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91174123) 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, 4250 + ... + 14156.

It is an arithmetic number, because the mean of its divisors is an integer number (22798308).

Almost surely, 2^91174121 is an apocalyptic number.

It is an amenable number.

91174121 is a deficient number, since it is larger than the sum of its proper divisors (19111).

91174121 is an equidigital number, since it uses as much as digits as its factorization.

91174121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19110.

The product of its digits is 504, while the sum is 26.

The square root of 91174121 is about 9548.5140728807. The cubic root of 91174121 is about 450.0808430887.

The spelling of 91174121 in words is "ninety-one million, one hundred seventy-four thousand, one hundred twenty-one".