428207903 has 2 divisors, whose sum is σ = 428207904. Its totient is φ = 428207902.

The previous prime is 428207891. The next prime is 428207909. The reversal of 428207903 is 309702824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428207903 - 2¹⁰ = 428206879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428207909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214103951 + 214103952.

It is an arithmetic number, because the mean of its divisors is an integer number (214103952).

Almost surely, 2^428207903 is an apocalyptic number.

428207903 is a deficient number, since it is larger than the sum of its proper divisors (1).

428207903 is an equidigital number, since it uses as much as digits as its factorization.

428207903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 428207903 is about 20693.1849409413. The cubic root of 428207903 is about 753.7342081367.

The spelling of 428207903 in words is "four hundred twenty-eight million, two hundred seven thousand, nine hundred three".