91699469 has 2 divisors, whose sum is σ = 91699470. Its totient is φ = 91699468.

The previous prime is 91699451. The next prime is 91699507. The reversal of 91699469 is 96499619.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57183844 + 34515625 = 7562^2 + 5875^2 .

It is a cyclic number.

It is not a de Polignac number, because 91699469 - 2²⁰ = 90650893 is a prime.

It is a super-2 number, since 2×91699469² = 16817585229763922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91699469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91699369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45849734 + 45849735.

It is an arithmetic number, because the mean of its divisors is an integer number (45849735).

Almost surely, 2^91699469 is an apocalyptic number.

It is an amenable number.

91699469 is a deficient number, since it is larger than the sum of its proper divisors (1).

91699469 is an equidigital number, since it uses as much as digits as its factorization.

91699469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 944784, while the sum is 53.

The square root of 91699469 is about 9575.9839703291. The cubic root of 91699469 is about 450.9436477756.

The spelling of 91699469 in words is "ninety-one million, six hundred ninety-nine thousand, four hundred sixty-nine".