12816577 has 2 divisors, whose sum is σ = 12816578. Its totient is φ = 12816576.

The previous prime is 12816569. The next prime is 12816581. The reversal of 12816577 is 77561821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11553201 + 1263376 = 3399^2 + 1124^2 .

It is a cyclic number.

It is not a de Polignac number, because 12816577 - 2³ = 12816569 is a prime.

It is not a weakly prime, because it can be changed into another prime (12816077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6408288 + 6408289.

It is an arithmetic number, because the mean of its divisors is an integer number (6408289).

Almost surely, 2^12816577 is an apocalyptic number.

It is an amenable number.

12816577 is a deficient number, since it is larger than the sum of its proper divisors (1).

12816577 is an equidigital number, since it uses as much as digits as its factorization.

12816577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23520, while the sum is 37.

The square root of 12816577 is about 3580.0247205850. The cubic root of 12816577 is about 234.0223576660.

The spelling of 12816577 in words is "twelve million, eight hundred sixteen thousand, five hundred seventy-seven".