91373671 has 2 divisors, whose sum is σ = 91373672. Its totient is φ = 91373670.

The previous prime is 91373617. The next prime is 91373699. The reversal of 91373671 is 17637319.

Together with previous prime (91373617) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91373671 - 2¹³ = 91365479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91373671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91373371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45686835 + 45686836.

It is an arithmetic number, because the mean of its divisors is an integer number (45686836).

Almost surely, 2^91373671 is an apocalyptic number.

91373671 is a deficient number, since it is larger than the sum of its proper divisors (1).

91373671 is an equidigital number, since it uses as much as digits as its factorization.

91373671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23814, while the sum is 37.

The square root of 91373671 is about 9558.9576314575. The cubic root of 91373671 is about 450.4089631982.

The spelling of 91373671 in words is "ninety-one million, three hundred seventy-three thousand, six hundred seventy-one".