91289701 has 2 divisors, whose sum is σ = 91289702. Its totient is φ = 91289700.

The previous prime is 91289689. The next prime is 91289713. The reversal of 91289701 is 10798219.

It is a balanced prime because it is at equal distance from previous prime (91289689) and next prime (91289713).

It can be written as a sum of positive squares in only one way, i.e., 78322500 + 12967201 = 8850^2 + 3601^2 .

It is an emirp because it is prime and its reverse (10798219) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91289701 - 2⁵ = 91289669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91269701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45644850 + 45644851.

It is an arithmetic number, because the mean of its divisors is an integer number (45644851).

Almost surely, 2^91289701 is an apocalyptic number.

It is an amenable number.

91289701 is a deficient number, since it is larger than the sum of its proper divisors (1).

91289701 is an equidigital number, since it uses as much as digits as its factorization.

91289701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 91289701 is about 9554.5644066069. The cubic root of 91289701 is about 450.2709495830.

The spelling of 91289701 in words is "ninety-one million, two hundred eighty-nine thousand, seven hundred one".