1656317329 has 2 divisors, whose sum is σ = 1656317330. Its totient is φ = 1656317328.

The previous prime is 1656317297. The next prime is 1656317347. The reversal of 1656317329 is 9237136561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1166359104 + 489958225 = 34152^2 + 22135^2 .

It is a cyclic number.

It is not a de Polignac number, because 1656317329 - 2⁵ = 1656317297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1656317359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828158664 + 828158665.

It is an arithmetic number, because the mean of its divisors is an integer number (828158665).

Almost surely, 2^1656317329 is an apocalyptic number.

It is an amenable number.

1656317329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656317329 is an equidigital number, since it uses as much as digits as its factorization.

1656317329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 43.

The square root of 1656317329 is about 40697.8786793612. The cubic root of 1656317329 is about 1183.1719049161.

The spelling of 1656317329 in words is "one billion, six hundred fifty-six million, three hundred seventeen thousand, three hundred twenty-nine".