428620523 has 2 divisors, whose sum is σ = 428620524. Its totient is φ = 428620522.

The previous prime is 428620513. The next prime is 428620531. The reversal of 428620523 is 325026824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428620523 - 2⁶ = 428620459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428620523.

It is not a weakly prime, because it can be changed into another prime (428620513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214310261 + 214310262.

It is an arithmetic number, because the mean of its divisors is an integer number (214310262).

Almost surely, 2^428620523 is an apocalyptic number.

428620523 is a deficient number, since it is larger than the sum of its proper divisors (1).

428620523 is an equidigital number, since it uses as much as digits as its factorization.

428620523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 428620523 is about 20703.1524894157. The cubic root of 428620523 is about 753.9762291779.

The spelling of 428620523 in words is "four hundred twenty-eight million, six hundred twenty thousand, five hundred twenty-three".