97385494891691 has 2 divisors, whose sum is σ = 97385494891692. Its totient is φ = 97385494891690.

The previous prime is 97385494891687. The next prime is 97385494891787. The reversal of 97385494891691 is 19619849458379.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97385494891691 - 2² = 97385494891687 is a prime.

It is not a weakly prime, because it can be changed into another prime (97385494891631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48692747445845 + 48692747445846.

It is an arithmetic number, because the mean of its divisors is an integer number (48692747445846).

Almost surely, 2^{97385494891691} is an apocalyptic number.

97385494891691 is a deficient number, since it is larger than the sum of its proper divisors (1).

97385494891691 is an equidigital number, since it uses as much as digits as its factorization.

97385494891691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4232632320, while the sum is 83.

The spelling of 97385494891691 in words is "ninety-seven trillion, three hundred eighty-five billion, four hundred ninety-four million, eight hundred ninety-one thousand, six hundred ninety-one".