97818679831 has 2 divisors, whose sum is σ = 97818679832. Its totient is φ = 97818679830.

The previous prime is 97818679807. The next prime is 97818679837. The reversal of 97818679831 is 13897681879.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97818679831 - 2⁹ = 97818679319 is a prime.

It is a super-2 number, since 2×97818679831² (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 (97818679837) 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, 48909339915 + 48909339916.

It is an arithmetic number, because the mean of its divisors is an integer number (48909339916).

Almost surely, 2^97818679831 is an apocalyptic number.

97818679831 is a deficient number, since it is larger than the sum of its proper divisors (1).

97818679831 is an equidigital number, since it uses as much as digits as its factorization.

97818679831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36578304, while the sum is 67.

The spelling of 97818679831 in words is "ninety-seven billion, eight hundred eighteen million, six hundred seventy-nine thousand, eight hundred thirty-one".