1720623243331 has 2 divisors, whose sum is σ = 1720623243332. Its totient is φ = 1720623243330.

The previous prime is 1720623243307. The next prime is 1720623243343. The reversal of 1720623243331 is 1333423260271.

It is a strong prime.

It is an emirp because it is prime and its reverse (1333423260271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1720623243331 - 2¹⁹ = 1720622719043 is a prime.

It is a super-2 number, since 2×1720623243331² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1720623244331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860311621665 + 860311621666.

It is an arithmetic number, because the mean of its divisors is an integer number (860311621666).

Almost surely, 2^{1720623243331} is an apocalyptic number.

1720623243331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720623243331 is an equidigital number, since it uses as much as digits as its factorization.

1720623243331 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 37.

The spelling of 1720623243331 in words is "one trillion, seven hundred twenty billion, six hundred twenty-three million, two hundred forty-three thousand, three hundred thirty-one".