91135423 has 2 divisors, whose sum is σ = 91135424. Its totient is φ = 91135422.

The previous prime is 91135409. The next prime is 91135439. The reversal of 91135423 is 32453119.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91135423 - 2⁵ = 91135391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91135391 and 91135400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91135823) 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, 45567711 + 45567712.

It is an arithmetic number, because the mean of its divisors is an integer number (45567712).

Almost surely, 2^91135423 is an apocalyptic number.

91135423 is a deficient number, since it is larger than the sum of its proper divisors (1).

91135423 is an equidigital number, since it uses as much as digits as its factorization.

91135423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 28.

The square root of 91135423 is about 9546.4874692213. The cubic root of 91135423 is about 450.0171565475.

The spelling of 91135423 in words is "ninety-one million, one hundred thirty-five thousand, four hundred twenty-three".