97385494891787 has 2 divisors, whose sum is σ = 97385494891788. Its totient is φ = 97385494891786.

The previous prime is 97385494891691. The next prime is 97385494891891. The reversal of 97385494891787 is 78719849458379.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (78719849458379) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97385494891787 - 2⁴⁰ = 96285983264011 is a prime.

It is not a weakly prime, because it can be changed into another prime (97385494891687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48692747445893 + 48692747445894.

It is an arithmetic number, because the mean of its divisors is an integer number (48692747445894).

Almost surely, 2^{97385494891787} is an apocalyptic number.

97385494891787 is a deficient number, since it is larger than the sum of its proper divisors (1).

97385494891787 is an equidigital number, since it uses as much as digits as its factorization.

97385494891787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30725775360, while the sum is 89.

The spelling of 97385494891787 in words is "ninety-seven trillion, three hundred eighty-five billion, four hundred ninety-four million, eight hundred ninety-one thousand, seven hundred eighty-seven".