128406683 has 2 divisors, whose sum is σ = 128406684. Its totient is φ = 128406682.

The previous prime is 128406667. The next prime is 128406697. The reversal of 128406683 is 386604821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128406683 - 2⁴ = 128406667 is a prime.

It is not a weakly prime, because it can be changed into another prime (128406623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64203341 + 64203342.

It is an arithmetic number, because the mean of its divisors is an integer number (64203342).

Almost surely, 2^128406683 is an apocalyptic number.

128406683 is a deficient number, since it is larger than the sum of its proper divisors (1).

128406683 is an equidigital number, since it uses as much as digits as its factorization.

128406683 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 128406683 is about 11331.6672647938. The cubic root of 128406683 is about 504.5015936796.

The spelling of 128406683 in words is "one hundred twenty-eight million, four hundred six thousand, six hundred eighty-three".