493881981797 has 2 divisors, whose sum is σ = 493881981798. Its totient is φ = 493881981796.

The previous prime is 493881981767. The next prime is 493881981829. The reversal of 493881981797 is 797189188394.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 349386205921 + 144495775876 = 591089^2 + 380126^2 .

It is a cyclic number.

It is not a de Polignac number, because 493881981797 - 2²² = 493877787493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (493881981707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246940990898 + 246940990899.

It is an arithmetic number, because the mean of its divisors is an integer number (246940990899).

Almost surely, 2^493881981797 is an apocalyptic number.

It is an amenable number.

493881981797 is a deficient number, since it is larger than the sum of its proper divisors (1).

493881981797 is an equidigital number, since it uses as much as digits as its factorization.

493881981797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 219469824, while the sum is 74.

The spelling of 493881981797 in words is "four hundred ninety-three billion, eight hundred eighty-one million, nine hundred eighty-one thousand, seven hundred ninety-seven".