91240023223 has 2 divisors, whose sum is σ = 91240023224. Its totient is φ = 91240023222.

The previous prime is 91240023157. The next prime is 91240023239. The reversal of 91240023223 is 32232004219.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91240023223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91240023191 and 91240023200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91240023283) 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, 45620011611 + 45620011612.

It is an arithmetic number, because the mean of its divisors is an integer number (45620011612).

Almost surely, 2^91240023223 is an apocalyptic number.

91240023223 is a deficient number, since it is larger than the sum of its proper divisors (1).

91240023223 is an equidigital number, since it uses as much as digits as its factorization.

91240023223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 91240023223 in words is "ninety-one billion, two hundred forty million, twenty-three thousand, two hundred twenty-three".