91611333923 has 2 divisors, whose sum is σ = 91611333924. Its totient is φ = 91611333922.

The previous prime is 91611333911. The next prime is 91611333929. The reversal of 91611333923 is 32933311619.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91611333923 - 2¹⁰ = 91611332899 is a prime.

It is not a weakly prime, because it can be changed into another prime (91611333929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45805666961 + 45805666962.

It is an arithmetic number, because the mean of its divisors is an integer number (45805666962).

Almost surely, 2^91611333923 is an apocalyptic number.

91611333923 is a deficient number, since it is larger than the sum of its proper divisors (1).

91611333923 is an equidigital number, since it uses as much as digits as its factorization.

91611333923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 41.

The spelling of 91611333923 in words is "ninety-one billion, six hundred eleven million, three hundred thirty-three thousand, nine hundred twenty-three".