97319791 has 2 divisors, whose sum is σ = 97319792. Its totient is φ = 97319790.

The previous prime is 97319759. The next prime is 97319891. The reversal of 97319791 is 19791379.

It is a weak prime.

It is an emirp because it is prime and its reverse (19791379) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97319791 - 2⁵ = 97319759 is a prime.

It is a super-2 number, since 2×97319791² = 18942283440567362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97319291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48659895 + 48659896.

It is an arithmetic number, because the mean of its divisors is an integer number (48659896).

Almost surely, 2^97319791 is an apocalyptic number.

97319791 is a deficient number, since it is larger than the sum of its proper divisors (1).

97319791 is an equidigital number, since it uses as much as digits as its factorization.

97319791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107163, while the sum is 46.

The square root of 97319791 is about 9865.0793711962. The cubic root of 97319791 is about 459.9744645560.

The spelling of 97319791 in words is "ninety-seven million, three hundred nineteen thousand, seven hundred ninety-one".