1306606537 has 2 divisors, whose sum is σ = 1306606538. Its totient is φ = 1306606536.

The previous prime is 1306606531. The next prime is 1306606541. The reversal of 1306606537 is 7356066031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1099850896 + 206755641 = 33164^2 + 14379^2 .

It is an emirp because it is prime and its reverse (7356066031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1306606537 - 2³ = 1306606529 is a prime.

It is a super-3 number, since 3×1306606537³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1306606496 and 1306606505.

It is not a weakly prime, because it can be changed into another prime (1306606531) 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, 653303268 + 653303269.

It is an arithmetic number, because the mean of its divisors is an integer number (653303269).

Almost surely, 2^1306606537 is an apocalyptic number.

It is an amenable number.

1306606537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306606537 is an equidigital number, since it uses as much as digits as its factorization.

1306606537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 1306606537 is about 36147.0128364710. The cubic root of 1306606537 is about 1093.2385619465.

The spelling of 1306606537 in words is "one billion, three hundred six million, six hundred six thousand, five hundred thirty-seven".