1729343381 has 2 divisors, whose sum is σ = 1729343382. Its totient is φ = 1729343380.

The previous prime is 1729343327. The next prime is 1729343419. The reversal of 1729343381 is 1833439271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1716776356 + 12567025 = 41434^2 + 3545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1729343381 is a prime.

It is a super-2 number, since 2×1729343381² = 5981257058817022322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1729343321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864671690 + 864671691.

It is an arithmetic number, because the mean of its divisors is an integer number (864671691).

Almost surely, 2^1729343381 is an apocalyptic number.

It is an amenable number.

1729343381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1729343381 is an equidigital number, since it uses as much as digits as its factorization.

1729343381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 1729343381 is about 41585.3746045410. The cubic root of 1729343381 is about 1200.3108872747.

The spelling of 1729343381 in words is "one billion, seven hundred twenty-nine million, three hundred forty-three thousand, three hundred eighty-one".