909091793 has 2 divisors, whose sum is σ = 909091794. Its totient is φ = 909091792.

The previous prime is 909091783. The next prime is 909091861. The reversal of 909091793 is 397190909.

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., 660335809 + 248755984 = 25697^2 + 15772^2 .

It is an emirp because it is prime and its reverse (397190909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 909091793 - 2¹⁰ = 909090769 is a prime.

It is not a weakly prime, because it can be changed into another prime (909091783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 454545896 + 454545897.

It is an arithmetic number, because the mean of its divisors is an integer number (454545897).

Almost surely, 2^909091793 is an apocalyptic number.

It is an amenable number.

909091793 is a deficient number, since it is larger than the sum of its proper divisors (1).

909091793 is an equidigital number, since it uses as much as digits as its factorization.

909091793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 137781, while the sum is 47.

The square root of 909091793 is about 30151.1491157468. The cubic root of 909091793 is about 968.7296201165.

The spelling of 909091793 in words is "nine hundred nine million, ninety-one thousand, seven hundred ninety-three".