1597926409 has 2 divisors, whose sum is σ = 1597926410. Its totient is φ = 1597926408.

The previous prime is 1597926359. The next prime is 1597926413. The reversal of 1597926409 is 9046297951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1515389184 + 82537225 = 38928^2 + 9085^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1597926409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1597926439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 798963204 + 798963205.

It is an arithmetic number, because the mean of its divisors is an integer number (798963205).

Almost surely, 2^1597926409 is an apocalyptic number.

It is an amenable number.

1597926409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1597926409 is an equidigital number, since it uses as much as digits as its factorization.

1597926409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1224720, while the sum is 52.

The square root of 1597926409 is about 39974.0717090466. The cubic root of 1597926409 is about 1169.1016087808.

The spelling of 1597926409 in words is "one billion, five hundred ninety-seven million, nine hundred twenty-six thousand, four hundred nine".