1397260575409 has 2 divisors, whose sum is σ = 1397260575410. Its totient is φ = 1397260575408.

The previous prime is 1397260575341. The next prime is 1397260575421. The reversal of 1397260575409 is 9045750627931.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1348199654400 + 49060921009 = 1161120^2 + 221497^2 .

It is an emirp because it is prime and its reverse (9045750627931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1397260575409 - 2¹⁵ = 1397260542641 is a prime.

It is not a weakly prime, because it can be changed into another prime (1397260575479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698630287704 + 698630287705.

It is an arithmetic number, because the mean of its divisors is an integer number (698630287705).

Almost surely, 2^{1397260575409} is an apocalyptic number.

It is an amenable number.

1397260575409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397260575409 is an equidigital number, since it uses as much as digits as its factorization.

1397260575409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14288400, while the sum is 58.

The spelling of 1397260575409 in words is "one trillion, three hundred ninety-seven billion, two hundred sixty million, five hundred seventy-five thousand, four hundred nine".