179149201993 has 2 divisors, whose sum is σ = 179149201994. Its totient is φ = 179149201992.

The previous prime is 179149201939. The next prime is 179149202021. The reversal of 179149201993 is 399102941971.

Together with previous prime (179149201939) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95794583049 + 83354618944 = 309507^2 + 288712^2 .

It is an emirp because it is prime and its reverse (399102941971) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 179149201993 - 2⁹ = 179149201481 is a prime.

It is not a weakly prime, because it can be changed into another prime (179149241993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 89574600996 + 89574600997.

It is an arithmetic number, because the mean of its divisors is an integer number (89574600997).

Almost surely, 2^179149201993 is an apocalyptic number.

It is an amenable number.

179149201993 is a deficient number, since it is larger than the sum of its proper divisors (1).

179149201993 is an equidigital number, since it uses as much as digits as its factorization.

179149201993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1102248, while the sum is 55.

The spelling of 179149201993 in words is "one hundred seventy-nine billion, one hundred forty-nine million, two hundred one thousand, nine hundred ninety-three".