1723412989 has 2 divisors, whose sum is σ = 1723412990. Its totient is φ = 1723412988.

The previous prime is 1723412969. The next prime is 1723413001. The reversal of 1723412989 is 9892143271.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1285222500 + 438190489 = 35850^2 + 20933^2 .

It is an emirp because it is prime and its reverse (9892143271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1723412989 - 2⁹ = 1723412477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1723412909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861706494 + 861706495.

It is an arithmetic number, because the mean of its divisors is an integer number (861706495).

Almost surely, 2^1723412989 is an apocalyptic number.

It is an amenable number.

1723412989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1723412989 is an equidigital number, since it uses as much as digits as its factorization.

1723412989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 46.

The square root of 1723412989 is about 41514.0095509937. The cubic root of 1723412989 is about 1198.9372509798.

The spelling of 1723412989 in words is "one billion, seven hundred twenty-three million, four hundred twelve thousand, nine hundred eighty-nine".