91208701 has 2 divisors, whose sum is σ = 91208702. Its totient is φ = 91208700.

The previous prime is 91208699. The next prime is 91208743. The reversal of 91208701 is 10780219.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89756676 + 1452025 = 9474^2 + 1205^2 .

It is a cyclic number.

It is not a de Polignac number, because 91208701 - 2¹ = 91208699 is a prime.

Together with 91208699, it forms a pair of twin primes.

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 91208701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91208101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45604350 + 45604351.

It is an arithmetic number, because the mean of its divisors is an integer number (45604351).

Almost surely, 2^91208701 is an apocalyptic number.

It is an amenable number.

91208701 is a deficient number, since it is larger than the sum of its proper divisors (1).

91208701 is an equidigital number, since it uses as much as digits as its factorization.

91208701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 91208701 is about 9550.3246541675. The cubic root of 91208701 is about 450.1377372606.

The spelling of 91208701 in words is "ninety-one million, two hundred eight thousand, seven hundred one".