91287349 has 2 divisors, whose sum is σ = 91287350. Its totient is φ = 91287348.

The previous prime is 91287307. The next prime is 91287407. The reversal of 91287349 is 94378219.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63091249 + 28196100 = 7943^2 + 5310^2 .

It is a cyclic number.

It is not a de Polignac number, because 91287349 - 2¹⁹ = 90763061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91281349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45643674 + 45643675.

It is an arithmetic number, because the mean of its divisors is an integer number (45643675).

Almost surely, 2^91287349 is an apocalyptic number.

It is an amenable number.

91287349 is a deficient number, since it is larger than the sum of its proper divisors (1).

91287349 is an equidigital number, since it uses as much as digits as its factorization.

91287349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 91287349 is about 9554.4413232800. The cubic root of 91287349 is about 450.2670826029.

The spelling of 91287349 in words is "ninety-one million, two hundred eighty-seven thousand, three hundred forty-nine".