1973668201 has 2 divisors, whose sum is σ = 1973668202. Its totient is φ = 1973668200.

The previous prime is 1973668189. The next prime is 1973668243. The reversal of 1973668201 is 1028663791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1940490601 + 33177600 = 44051^2 + 5760^2 .

It is an emirp because it is prime and its reverse (1028663791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1973668201 - 2²⁹ = 1436797289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1973663201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986834100 + 986834101.

It is an arithmetic number, because the mean of its divisors is an integer number (986834101).

Almost surely, 2^1973668201 is an apocalyptic number.

It is an amenable number.

1973668201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1973668201 is an equidigital number, since it uses as much as digits as its factorization.

1973668201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 1973668201 is about 44425.9856502926. The cubic root of 1973668201 is about 1254.3672733156.

The spelling of 1973668201 in words is "one billion, nine hundred seventy-three million, six hundred sixty-eight thousand, two hundred one".