91806067 has 2 divisors, whose sum is σ = 91806068. Its totient is φ = 91806066.

The previous prime is 91806031. The next prime is 91806101. The reversal of 91806067 is 76060819.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91806067 - 2²³ = 83417459 is a prime.

It is not a weakly prime, because it can be changed into another prime (91806007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45903033 + 45903034.

It is an arithmetic number, because the mean of its divisors is an integer number (45903034).

Almost surely, 2^91806067 is an apocalyptic number.

91806067 is a deficient number, since it is larger than the sum of its proper divisors (1).

91806067 is an equidigital number, since it uses as much as digits as its factorization.

91806067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 91806067 is about 9581.5482569363. The cubic root of 91806067 is about 451.1183164586.

The spelling of 91806067 in words is "ninety-one million, eight hundred six thousand, sixty-seven".