91838501 has 2 divisors, whose sum is σ = 91838502. Its totient is φ = 91838500.

The previous prime is 91838491. The next prime is 91838507. The reversal of 91838501 is 10583819.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74407876 + 17430625 = 8626^2 + 4175^2 .

It is a cyclic number.

It is not a de Polignac number, because 91838501 - 2¹⁰ = 91837477 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91838507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45919250 + 45919251.

It is an arithmetic number, because the mean of its divisors is an integer number (45919251).

Almost surely, 2^91838501 is an apocalyptic number.

It is an amenable number.

91838501 is a deficient number, since it is larger than the sum of its proper divisors (1).

91838501 is an equidigital number, since it uses as much as digits as its factorization.

91838501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 91838501 is about 9583.2406314357. The cubic root of 91838501 is about 451.1714351294.

The spelling of 91838501 in words is "ninety-one million, eight hundred thirty-eight thousand, five hundred one".