1345726609 has 2 divisors, whose sum is σ = 1345726610. Its totient is φ = 1345726608.

The previous prime is 1345726583. The next prime is 1345726633. The reversal of 1345726609 is 9066275431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 920212225 + 425514384 = 30335^2 + 20628^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345726609 - 2⁹ = 1345726097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1345726009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672863304 + 672863305.

It is an arithmetic number, because the mean of its divisors is an integer number (672863305).

Almost surely, 2^1345726609 is an apocalyptic number.

It is an amenable number.

1345726609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345726609 is an equidigital number, since it uses as much as digits as its factorization.

1345726609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 1345726609 is about 36684.1465622413. The cubic root of 1345726609 is about 1104.0420460361.

The spelling of 1345726609 in words is "one billion, three hundred forty-five million, seven hundred twenty-six thousand, six hundred nine".