91520467 has 2 divisors, whose sum is σ = 91520468. Its totient is φ = 91520466.

The previous prime is 91520461. The next prime is 91520477. The reversal of 91520467 is 76402519.

It is a weak prime.

It is an emirp because it is prime and its reverse (76402519) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91520467 is a prime.

It is not a weakly prime, because it can be changed into another prime (91520461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45760233 + 45760234.

It is an arithmetic number, because the mean of its divisors is an integer number (45760234).

Almost surely, 2^91520467 is an apocalyptic number.

91520467 is a deficient number, since it is larger than the sum of its proper divisors (1).

91520467 is an equidigital number, since it uses as much as digits as its factorization.

91520467 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 91520467 is about 9566.6330022636. The cubic root of 91520467 is about 450.6500350433.

The spelling of 91520467 in words is "ninety-one million, five hundred twenty thousand, four hundred sixty-seven".