128232437 has 2 divisors, whose sum is σ = 128232438. Its totient is φ = 128232436.

The previous prime is 128232421. The next prime is 128232449. The reversal of 128232437 is 734232821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90459121 + 37773316 = 9511^2 + 6146^2 .

It is a cyclic number.

It is not a de Polignac number, because 128232437 - 2⁴ = 128232421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128232487) 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, 64116218 + 64116219.

It is an arithmetic number, because the mean of its divisors is an integer number (64116219).

Almost surely, 2^128232437 is an apocalyptic number.

It is an amenable number.

128232437 is a deficient number, since it is larger than the sum of its proper divisors (1).

128232437 is an equidigital number, since it uses as much as digits as its factorization.

128232437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 32.

The square root of 128232437 is about 11323.9762009640. The cubic root of 128232437 is about 504.2732899401.

The spelling of 128232437 in words is "one hundred twenty-eight million, two hundred thirty-two thousand, four hundred thirty-seven".