91069513 has 2 divisors, whose sum is σ = 91069514. Its totient is φ = 91069512.

The previous prime is 91069507. The next prime is 91069553. The reversal of 91069513 is 31596019.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84879369 + 6190144 = 9213^2 + 2488^2 .

It is a cyclic number.

It is not a de Polignac number, because 91069513 - 2⁹ = 91069001 is a prime.

It is not a weakly prime, because it can be changed into another prime (91069553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45534756 + 45534757.

It is an arithmetic number, because the mean of its divisors is an integer number (45534757).

Almost surely, 2^91069513 is an apocalyptic number.

It is an amenable number.

91069513 is a deficient number, since it is larger than the sum of its proper divisors (1).

91069513 is an equidigital number, since it uses as much as digits as its factorization.

91069513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 91069513 is about 9543.0347898349. The cubic root of 91069513 is about 449.9086448296.

The spelling of 91069513 in words is "ninety-one million, sixty-nine thousand, five hundred thirteen".