91940600669 has 2 divisors, whose sum is σ = 91940600670. Its totient is φ = 91940600668.

The previous prime is 91940600603. The next prime is 91940600789. The reversal of 91940600669 is 96600604919.

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., 88201278169 + 3739322500 = 296987^2 + 61150^2 .

It is a cyclic number.

It is not a de Polignac number, because 91940600669 - 2³² = 87645633373 is a prime.

It is a super-2 number, since 2×91940600669² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91940600569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45970300334 + 45970300335.

It is an arithmetic number, because the mean of its divisors is an integer number (45970300335).

Almost surely, 2^91940600669 is an apocalyptic number.

It is an amenable number.

91940600669 is a deficient number, since it is larger than the sum of its proper divisors (1).

91940600669 is an equidigital number, since it uses as much as digits as its factorization.

91940600669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 629856, while the sum is 50.

The spelling of 91940600669 in words is "ninety-one billion, nine hundred forty million, six hundred thousand, six hundred sixty-nine".