97639326847 has 2 divisors, whose sum is σ = 97639326848. Its totient is φ = 97639326846.

The previous prime is 97639326833. The next prime is 97639326857. The reversal of 97639326847 is 74862393679.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97639326847 is a prime.

It is a super-2 number, since 2×97639326847² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97639326857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48819663423 + 48819663424.

It is an arithmetic number, because the mean of its divisors is an integer number (48819663424).

Almost surely, 2^97639326847 is an apocalyptic number.

97639326847 is a deficient number, since it is larger than the sum of its proper divisors (1).

97639326847 is an equidigital number, since it uses as much as digits as its factorization.

97639326847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82301184, while the sum is 64.

It can be divided in two parts, 9763932 and 6847, that added together give a palindrome (9770779).

The spelling of 97639326847 in words is "ninety-seven billion, six hundred thirty-nine million, three hundred twenty-six thousand, eight hundred forty-seven".