91177121 has 8 divisors (see below), whose sum is σ = 104779584. Its totient is φ = 77718960.

The previous prime is 91177117. The next prime is 91177183. The reversal of 91177121 is 12177119.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91177121 - 2² = 91177117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91177111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34715 + ... + 37248.

It is an arithmetic number, because the mean of its divisors is an integer number (13097448).

Almost surely, 2^91177121 is an apocalyptic number.

It is an amenable number.

91177121 is a deficient number, since it is larger than the sum of its proper divisors (13602463).

91177121 is a wasteful number, since it uses less digits than its factorization.

91177121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72151.

The product of its digits is 882, while the sum is 29.

The square root of 91177121 is about 9548.6711640940. The cubic root of 91177121 is about 450.0857795323.

The spelling of 91177121 in words is "ninety-one million, one hundred seventy-seven thousand, one hundred twenty-one".