91856467 has 2 divisors, whose sum is σ = 91856468. Its totient is φ = 91856466.

The previous prime is 91856449. The next prime is 91856477. The reversal of 91856467 is 76465819.

It is a strong prime.

It is an emirp because it is prime and its reverse (76465819) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91856467 - 2⁷ = 91856339 is a prime.

It is a super-2 number, since 2×91856467² = 16875221059444178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91856417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45928233 + 45928234.

It is an arithmetic number, because the mean of its divisors is an integer number (45928234).

Almost surely, 2^91856467 is an apocalyptic number.

91856467 is a deficient number, since it is larger than the sum of its proper divisors (1).

91856467 is an equidigital number, since it uses as much as digits as its factorization.

91856467 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 46.

The square root of 91856467 is about 9584.1779511860. The cubic root of 91856467 is about 451.2008535012.

It can be divided in two parts, 9185 and 6467, that multiplied together give a palindrome (59399395).

The spelling of 91856467 in words is "ninety-one million, eight hundred fifty-six thousand, four hundred sixty-seven".