1309207 has 2 divisors, whose sum is σ = 1309208. Its totient is φ = 1309206.

The previous prime is 1309181. The next prime is 1309211. The reversal of 1309207 is 7029031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1309207 - 2⁷ = 1309079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1309237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 654603 + 654604.

It is an arithmetic number, because the mean of its divisors is an integer number (654604).

2^1309207 is an apocalyptic number.

1309207 is a deficient number, since it is larger than the sum of its proper divisors (1).

1309207 is an equidigital number, since it uses as much as digits as its factorization.

1309207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 1309207 is about 1144.2058381253. The cubic root of 1309207 is about 109.3963351033.

The spelling of 1309207 in words is "one million, three hundred nine thousand, two hundred seven".