91069553 has 2 divisors, whose sum is σ = 91069554. Its totient is φ = 91069552.

The previous prime is 91069513. The next prime is 91069591. The reversal of 91069553 is 35596019.

It is an a-pointer prime, because the next prime (91069591) can be obtained adding 91069553 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90402064 + 667489 = 9508^2 + 817^2 .

It is a cyclic number.

It is not a de Polignac number, because 91069553 - 2¹⁰ = 91068529 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91069513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45534776 + 45534777.

It is an arithmetic number, because the mean of its divisors is an integer number (45534777).

Almost surely, 2^91069553 is an apocalyptic number.

It is an amenable number.

91069553 is a deficient number, since it is larger than the sum of its proper divisors (1).

91069553 is an equidigital number, since it uses as much as digits as its factorization.

91069553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 91069553 is about 9543.0368856041. The cubic root of 91069553 is about 449.9087106999.

The spelling of 91069553 in words is "ninety-one million, sixty-nine thousand, five hundred fifty-three".