91127973 has 16 divisors (see below), whose sum is σ = 130576320. Its totient is φ = 56322816.

The previous prime is 91127969. The next prime is 91127977. The reversal of 91127973 is 37972119.

It is an interprime number because it is at equal distance from previous prime (91127969) and next prime (91127977).

It is not a de Polignac number, because 91127973 - 2² = 91127969 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91127977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9918 + ... + 16751.

It is an arithmetic number, because the mean of its divisors is an integer number (8161020).

Almost surely, 2^91127973 is an apocalyptic number.

It is an amenable number.

91127973 is a deficient number, since it is larger than the sum of its proper divisors (39448347).

91127973 is a wasteful number, since it uses less digits than its factorization.

91127973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26756.

The product of its digits is 23814, while the sum is 39.

The square root of 91127973 is about 9546.0972653750. The cubic root of 91127973 is about 450.0048937739.

The spelling of 91127973 in words is "ninety-one million, one hundred twenty-seven thousand, nine hundred seventy-three".