1709023649 has 2 divisors, whose sum is σ = 1709023650. Its totient is φ = 1709023648.

The previous prime is 1709023643. The next prime is 1709023711. The reversal of 1709023649 is 9463209071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1188043024 + 520980625 = 34468^2 + 22825^2 .

It is a cyclic number.

It is not a de Polignac number, because 1709023649 - 2¹⁶ = 1708958113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1709023643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 854511824 + 854511825.

It is an arithmetic number, because the mean of its divisors is an integer number (854511825).

Almost surely, 2^1709023649 is an apocalyptic number.

It is an amenable number.

1709023649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1709023649 is an equidigital number, since it uses as much as digits as its factorization.

1709023649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 1709023649 is about 41340.3392463100. The cubic root of 1709023649 is about 1195.5911476795.

The spelling of 1709023649 in words is "one billion, seven hundred nine million, twenty-three thousand, six hundred forty-nine".