1359539561 has 2 divisors, whose sum is σ = 1359539562. Its totient is φ = 1359539560.

The previous prime is 1359539551. The next prime is 1359539569. The reversal of 1359539561 is 1659359531.

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., 1357480336 + 2059225 = 36844^2 + 1435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1359539561 is a prime.

It is not a weakly prime, because it can be changed into another prime (1359539569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 679769780 + 679769781.

It is an arithmetic number, because the mean of its divisors is an integer number (679769781).

Almost surely, 2^1359539561 is an apocalyptic number.

It is an amenable number.

1359539561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1359539561 is an equidigital number, since it uses as much as digits as its factorization.

1359539561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 546750, while the sum is 47.

The square root of 1359539561 is about 36871.9345980110. The cubic root of 1359539561 is about 1107.8066041640.

The spelling of 1359539561 in words is "one billion, three hundred fifty-nine million, five hundred thirty-nine thousand, five hundred sixty-one".