91235741 has 2 divisors, whose sum is σ = 91235742. Its totient is φ = 91235740.

The previous prime is 91235731. The next prime is 91235743. The reversal of 91235741 is 14753219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48594841 + 42640900 = 6971^2 + 6530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91235741 is a prime.

Together with 91235743, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 91235698 and 91235707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91235743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45617870 + 45617871.

It is an arithmetic number, because the mean of its divisors is an integer number (45617871).

Almost surely, 2^91235741 is an apocalyptic number.

It is an amenable number.

91235741 is a deficient number, since it is larger than the sum of its proper divisors (1).

91235741 is an equidigital number, since it uses as much as digits as its factorization.

91235741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 91235741 is about 9551.7402079412. The cubic root of 91235741 is about 450.1822159183.

The spelling of 91235741 in words is "ninety-one million, two hundred thirty-five thousand, seven hundred forty-one".