91934897 has 2 divisors, whose sum is σ = 91934898. Its totient is φ = 91934896.

The previous prime is 91934893. The next prime is 91934911. The reversal of 91934897 is 79843919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48427681 + 43507216 = 6959^2 + 6596^2 .

It is an emirp because it is prime and its reverse (79843919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91934897 - 2² = 91934893 is a prime.

It is not a weakly prime, because it can be changed into another prime (91934891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45967448 + 45967449.

It is an arithmetic number, because the mean of its divisors is an integer number (45967449).

Almost surely, 2^91934897 is an apocalyptic number.

It is an amenable number.

91934897 is a deficient number, since it is larger than the sum of its proper divisors (1).

91934897 is an equidigital number, since it uses as much as digits as its factorization.

91934897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 50.

The square root of 91934897 is about 9588.2687175527. The cubic root of 91934897 is about 451.3292335604.

The spelling of 91934897 in words is "ninety-one million, nine hundred thirty-four thousand, eight hundred ninety-seven".