128926403 has 2 divisors, whose sum is σ = 128926404. Its totient is φ = 128926402.

The previous prime is 128926327. The next prime is 128926409. The reversal of 128926403 is 304629821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128926403 - 2¹⁸ = 128664259 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (128926409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64463201 + 64463202.

It is an arithmetic number, because the mean of its divisors is an integer number (64463202).

Almost surely, 2^128926403 is an apocalyptic number.

128926403 is a deficient number, since it is larger than the sum of its proper divisors (1).

128926403 is an equidigital number, since it uses as much as digits as its factorization.

128926403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 128926403 is about 11354.5763020907. The cubic root of 128926403 is about 505.1813262517.

The spelling of 128926403 in words is "one hundred twenty-eight million, nine hundred twenty-six thousand, four hundred three".