91424129 has 2 divisors, whose sum is σ = 91424130. Its totient is φ = 91424128.

The previous prime is 91424107. The next prime is 91424141. The reversal of 91424129 is 92142419.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74218225 + 17205904 = 8615^2 + 4148^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91424129 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 91424095 and 91424104.

It is not a weakly prime, because it can be changed into another prime (91424159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45712064 + 45712065.

It is an arithmetic number, because the mean of its divisors is an integer number (45712065).

Almost surely, 2^91424129 is an apocalyptic number.

It is an amenable number.

91424129 is a deficient number, since it is larger than the sum of its proper divisors (1).

91424129 is an equidigital number, since it uses as much as digits as its factorization.

91424129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 91424129 is about 9561.5965717029. The cubic root of 91424129 is about 450.4918556154.

The spelling of 91424129 in words is "ninety-one million, four hundred twenty-four thousand, one hundred twenty-nine".