188711302993 has 2 divisors, whose sum is σ = 188711302994. Its totient is φ = 188711302992.

The previous prime is 188711302973. The next prime is 188711303023. The reversal of 188711302993 is 399203117881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166895126784 + 21816176209 = 408528^2 + 147703^2 .

It is an emirp because it is prime and its reverse (399203117881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 188711302993 - 2¹³ = 188711294801 is a prime.

It is a super-2 number, since 2×188711302993² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 188711302993.

It is not a weakly prime, because it can be changed into another prime (188711302973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94355651496 + 94355651497.

It is an arithmetic number, because the mean of its divisors is an integer number (94355651497).

Almost surely, 2^188711302993 is an apocalyptic number.

It is an amenable number.

188711302993 is a deficient number, since it is larger than the sum of its proper divisors (1).

188711302993 is an equidigital number, since it uses as much as digits as its factorization.

188711302993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 52.

The spelling of 188711302993 in words is "one hundred eighty-eight billion, seven hundred eleven million, three hundred two thousand, nine hundred ninety-three".