91701971 has 4 divisors (see below), whose sum is σ = 93205344. Its totient is φ = 90198600.

The previous prime is 91701959. The next prime is 91701977. The reversal of 91701971 is 17910719.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91701971 - 2¹⁸ = 91439827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91701977) 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, 751595 + ... + 751716.

It is an arithmetic number, because the mean of its divisors is an integer number (23301336).

Almost surely, 2^91701971 is an apocalyptic number.

91701971 is a deficient number, since it is larger than the sum of its proper divisors (1503373).

91701971 is a wasteful number, since it uses less digits than its factorization.

91701971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503372.

The product of its (nonzero) digits is 3969, while the sum is 35.

The square root of 91701971 is about 9576.1146087544. The cubic root of 91701971 is about 450.9477490380.

The spelling of 91701971 in words is "ninety-one million, seven hundred one thousand, nine hundred seventy-one".