128716213 has 2 divisors, whose sum is σ = 128716214. Its totient is φ = 128716212.

The previous prime is 128716193. The next prime is 128716223. The reversal of 128716213 is 312617821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128187684 + 528529 = 11322^2 + 727^2 .

It is a cyclic number.

It is not a de Polignac number, because 128716213 - 2²¹ = 126619061 is a prime.

It is a super-2 number, since 2×128716213² = 33135726978122738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128716223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64358106 + 64358107.

It is an arithmetic number, because the mean of its divisors is an integer number (64358107).

Almost surely, 2^128716213 is an apocalyptic number.

It is an amenable number.

128716213 is a deficient number, since it is larger than the sum of its proper divisors (1).

128716213 is an equidigital number, since it uses as much as digits as its factorization.

128716213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The square root of 128716213 is about 11345.3167871153. The cubic root of 128716213 is about 504.9066428739.

The spelling of 128716213 in words is "one hundred twenty-eight million, seven hundred sixteen thousand, two hundred thirteen".