1309853497 has 2 divisors, whose sum is σ = 1309853498. Its totient is φ = 1309853496.

The previous prime is 1309853491. The next prime is 1309853561. The reversal of 1309853497 is 7943589031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 964785721 + 345067776 = 31061^2 + 18576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1309853497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1309853497.

It is not a weakly prime, because it can be changed into another prime (1309853491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 654926748 + 654926749.

It is an arithmetic number, because the mean of its divisors is an integer number (654926749).

Almost surely, 2^1309853497 is an apocalyptic number.

It is an amenable number.

1309853497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1309853497 is an equidigital number, since it uses as much as digits as its factorization.

1309853497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 1309853497 is about 36191.8982232212. The cubic root of 1309853497 is about 1094.1433907169.

The spelling of 1309853497 in words is "one billion, three hundred nine million, eight hundred fifty-three thousand, four hundred ninety-seven".