1309807 has 2 divisors, whose sum is σ = 1309808. Its totient is φ = 1309806.

The previous prime is 1309801. The next prime is 1309811. The reversal of 1309807 is 7089031.

It is a strong prime.

It is an emirp because it is prime and its reverse (7089031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1309807 - 2¹⁵ = 1277039 is a prime.

1309807 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1309801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 654903 + 654904.

It is an arithmetic number, because the mean of its divisors is an integer number (654904).

2^1309807 is an apocalyptic number.

1309807 is a deficient number, since it is larger than the sum of its proper divisors (1).

1309807 is an equidigital number, since it uses as much as digits as its factorization.

1309807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1309807 is about 1144.4679986789. The cubic root of 1309807 is about 109.4130443980.

It can be divided in two parts, 1309 and 807, that added together give a square (2116 = 46²).

The spelling of 1309807 in words is "one million, three hundred nine thousand, eight hundred seven".