128263237 has 2 divisors, whose sum is σ = 128263238. Its totient is φ = 128263236.

The previous prime is 128263231. The next prime is 128263273. The reversal of 128263237 is 732362821.

Together with next prime (128263273) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92275236 + 35988001 = 9606^2 + 5999^2 .

It is a cyclic number.

It is not a de Polignac number, because 128263237 - 2¹⁵ = 128230469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128263231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64131618 + 64131619.

It is an arithmetic number, because the mean of its divisors is an integer number (64131619).

Almost surely, 2^128263237 is an apocalyptic number.

It is an amenable number.

128263237 is a deficient number, since it is larger than the sum of its proper divisors (1).

128263237 is an equidigital number, since it uses as much as digits as its factorization.

128263237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 34.

The square root of 128263237 is about 11325.3360656539. The cubic root of 128263237 is about 504.3136603132.

The spelling of 128263237 in words is "one hundred twenty-eight million, two hundred sixty-three thousand, two hundred thirty-seven".