91703971 has 2 divisors, whose sum is σ = 91703972. Its totient is φ = 91703970.

The previous prime is 91703957. The next prime is 91703981. The reversal of 91703971 is 17930719.

It is a strong prime.

It is an emirp because it is prime and its reverse (17930719) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91703971 - 2²³ = 83315363 is a prime.

It is a super-3 number, since 3×91703971³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91703971.

It is not a weakly prime, because it can be changed into another prime (91703981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45851985 + 45851986.

It is an arithmetic number, because the mean of its divisors is an integer number (45851986).

Almost surely, 2^91703971 is an apocalyptic number.

91703971 is a deficient number, since it is larger than the sum of its proper divisors (1).

91703971 is an equidigital number, since it uses as much as digits as its factorization.

91703971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11907, while the sum is 37.

The square root of 91703971 is about 9576.2190346713. The cubic root of 91703971 is about 450.9510273715.

The spelling of 91703971 in words is "ninety-one million, seven hundred three thousand, nine hundred seventy-one".