91027907 has 2 divisors, whose sum is σ = 91027908. Its totient is φ = 91027906.

The previous prime is 91027901. The next prime is 91027919. The reversal of 91027907 is 70972019.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91027907 - 2¹⁰ = 91026883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91027901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45513953 + 45513954.

It is an arithmetic number, because the mean of its divisors is an integer number (45513954).

Almost surely, 2^91027907 is an apocalyptic number.

91027907 is a deficient number, since it is larger than the sum of its proper divisors (1).

91027907 is an equidigital number, since it uses as much as digits as its factorization.

91027907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 91027907 is about 9540.8546262900. The cubic root of 91027907 is about 449.8401193344.

The spelling of 91027907 in words is "ninety-one million, twenty-seven thousand, nine hundred seven".