128893213 has 2 divisors, whose sum is σ = 128893214. Its totient is φ = 128893212.

The previous prime is 128893211. The next prime is 128893241. The reversal of 128893213 is 312398821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111894084 + 16999129 = 10578^2 + 4123^2 .

It is a cyclic number.

It is not a de Polignac number, because 128893213 - 2¹ = 128893211 is a prime.

It is a super-2 number, since 2×128893213² = 33226920714926738, which contains 22 as substring.

Together with 128893211, it forms a pair of twin primes.

It is equal to p_7318972 and since 128893213 and 7318972 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128893211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64446606 + 64446607.

It is an arithmetic number, because the mean of its divisors is an integer number (64446607).

Almost surely, 2^128893213 is an apocalyptic number.

It is an amenable number.

128893213 is a deficient number, since it is larger than the sum of its proper divisors (1).

128893213 is an equidigital number, since it uses as much as digits as its factorization.

128893213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 128893213 is about 11353.1146827644. The cubic root of 128893213 is about 505.1379722998.

The spelling of 128893213 in words is "one hundred twenty-eight million, eight hundred ninety-three thousand, two hundred thirteen".