88197718209493 has 2 divisors, whose sum is σ = 88197718209494. Its totient is φ = 88197718209492.

The previous prime is 88197718209479. The next prime is 88197718209539. The reversal of 88197718209493 is 39490281779188.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48284612356369 + 39913105853124 = 6948713^2 + 6317682^2 .

It is a cyclic number.

It is not a de Polignac number, because 88197718209493 - 2²⁵ = 88197684655061 is a prime.

It is a super-2 number, since 2×88197718209493² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88197718209413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44098859104746 + 44098859104747.

It is an arithmetic number, because the mean of its divisors is an integer number (44098859104747).

Almost surely, 2^{88197718209493} is an apocalyptic number.

It is an amenable number.

88197718209493 is a deficient number, since it is larger than the sum of its proper divisors (1).

88197718209493 is an equidigital number, since it uses as much as digits as its factorization.

88197718209493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 438939648, while the sum is 76.

The spelling of 88197718209493 in words is "eighty-eight trillion, one hundred ninety-seven billion, seven hundred eighteen million, two hundred nine thousand, four hundred ninety-three".