1356922729 has 2 divisors, whose sum is σ = 1356922730. Its totient is φ = 1356922728.

The previous prime is 1356922727. The next prime is 1356922741. The reversal of 1356922729 is 9272296531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1350930025 + 5992704 = 36755^2 + 2448^2 .

It is an emirp because it is prime and its reverse (9272296531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1356922729 - 2¹ = 1356922727 is a prime.

Together with 1356922727, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1356922727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678461364 + 678461365.

It is an arithmetic number, because the mean of its divisors is an integer number (678461365).

Almost surely, 2^1356922729 is an apocalyptic number.

It is an amenable number.

1356922729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356922729 is an equidigital number, since it uses as much as digits as its factorization.

1356922729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 46.

The square root of 1356922729 is about 36836.4320883551. The cubic root of 1356922729 is about 1107.0953815801.

The spelling of 1356922729 in words is "one billion, three hundred fifty-six million, nine hundred twenty-two thousand, seven hundred twenty-nine".