91240307 has 2 divisors, whose sum is σ = 91240308. Its totient is φ = 91240306.

The previous prime is 91240277. The next prime is 91240313. The reversal of 91240307 is 70304219.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91240307 - 2⁶ = 91240243 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91240327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45620153 + 45620154.

It is an arithmetic number, because the mean of its divisors is an integer number (45620154).

Almost surely, 2^91240307 is an apocalyptic number.

91240307 is a deficient number, since it is larger than the sum of its proper divisors (1).

91240307 is an equidigital number, since it uses as much as digits as its factorization.

91240307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 91240307 is about 9551.9792189891. The cubic root of 91240307 is about 450.1897257593.

The spelling of 91240307 in words is "ninety-one million, two hundred forty thousand, three hundred seven".