1720102001 has 2 divisors, whose sum is σ = 1720102002. Its totient is φ = 1720102000.

The previous prime is 1720101983. The next prime is 1720102009. The reversal of 1720102001 is 1002010271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 984390625 + 735711376 = 31375^2 + 27124^2 .

It is an emirp because it is prime and its reverse (1002010271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1720102001 - 2¹⁴ = 1720085617 is a prime.

It is not a weakly prime, because it can be changed into another prime (1720102009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860051000 + 860051001.

It is an arithmetic number, because the mean of its divisors is an integer number (860051001).

Almost surely, 2^1720102001 is an apocalyptic number.

It is an amenable number.

1720102001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720102001 is an equidigital number, since it uses as much as digits as its factorization.

1720102001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 1720102001 is about 41474.1124196769. The cubic root of 1720102001 is about 1198.1689670103.

Adding to 1720102001 its reverse (1002010271), we get a palindrome (2722112272).

The spelling of 1720102001 in words is "one billion, seven hundred twenty million, one hundred two thousand, one".