1608388697 has 2 divisors, whose sum is σ = 1608388698. Its totient is φ = 1608388696.

The previous prime is 1608388681. The next prime is 1608388709. The reversal of 1608388697 is 7968838061.

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., 1246019401 + 362369296 = 35299^2 + 19036^2 .

It is an emirp because it is prime and its reverse (7968838061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1608388697 - 2⁴ = 1608388681 is a prime.

It is not a weakly prime, because it can be changed into another prime (1608388637) 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, 804194348 + 804194349.

It is an arithmetic number, because the mean of its divisors is an integer number (804194349).

Almost surely, 2^1608388697 is an apocalyptic number.

It is an amenable number.

1608388697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1608388697 is an equidigital number, since it uses as much as digits as its factorization.

1608388697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3483648, while the sum is 56.

The square root of 1608388697 is about 40104.7216297533. The cubic root of 1608388697 is about 1171.6475916012.

The spelling of 1608388697 in words is "one billion, six hundred eight million, three hundred eighty-eight thousand, six hundred ninety-seven".