1348385729 has 2 divisors, whose sum is σ = 1348385730. Its totient is φ = 1348385728.

The previous prime is 1348385693. The next prime is 1348385747. The reversal of 1348385729 is 9275838431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1346890000 + 1495729 = 36700^2 + 1223^2 .

It is a cyclic number.

It is not a de Polignac number, because 1348385729 - 2⁸ = 1348385473 is a prime.

It is a super-2 number, since 2×1348385729² = 3636288148341722882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1348385029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 674192864 + 674192865.

It is an arithmetic number, because the mean of its divisors is an integer number (674192865).

Almost surely, 2^1348385729 is an apocalyptic number.

It is an amenable number.

1348385729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1348385729 is an equidigital number, since it uses as much as digits as its factorization.

1348385729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 50.

The square root of 1348385729 is about 36720.3721250207. The cubic root of 1348385729 is about 1104.7687535043.

The spelling of 1348385729 in words is "one billion, three hundred forty-eight million, three hundred eighty-five thousand, seven hundred twenty-nine".