91027007 has 2 divisors, whose sum is σ = 91027008. Its totient is φ = 91027006.

The previous prime is 91026997. The next prime is 91027009. The reversal of 91027007 is 70072019.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91027007 is a prime.

Together with 91027009, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91027009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45513503 + 45513504.

It is an arithmetic number, because the mean of its divisors is an integer number (45513504).

Almost surely, 2^91027007 is an apocalyptic number.

91027007 is a deficient number, since it is larger than the sum of its proper divisors (1).

91027007 is an equidigital number, since it uses as much as digits as its factorization.

91027007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 882, while the sum is 26.

The square root of 91027007 is about 9540.8074605874. The cubic root of 91027007 is about 449.8386367947.

The spelling of 91027007 in words is "ninety-one million, twenty-seven thousand, seven".