91058549 has 2 divisors, whose sum is σ = 91058550. Its totient is φ = 91058548.

The previous prime is 91058503. The next prime is 91058609. The reversal of 91058549 is 94585019.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81180100 + 9878449 = 9010^2 + 3143^2 .

It is a cyclic number.

It is not a de Polignac number, because 91058549 - 2¹⁶ = 90993013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91054549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45529274 + 45529275.

It is an arithmetic number, because the mean of its divisors is an integer number (45529275).

Almost surely, 2^91058549 is an apocalyptic number.

It is an amenable number.

91058549 is a deficient number, since it is larger than the sum of its proper divisors (1).

91058549 is an equidigital number, since it uses as much as digits as its factorization.

91058549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 91058549 is about 9542.4603221601. The cubic root of 91058549 is about 449.8905890383.

The spelling of 91058549 in words is "ninety-one million, fifty-eight thousand, five hundred forty-nine".