428993959 has 2 divisors, whose sum is σ = 428993960. Its totient is φ = 428993958.

The previous prime is 428993821. The next prime is 428993969. The reversal of 428993959 is 959399824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428993959 - 2¹⁵ = 428961191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428993969) 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, 214496979 + 214496980.

It is an arithmetic number, because the mean of its divisors is an integer number (214496980).

Almost surely, 2^428993959 is an apocalyptic number.

428993959 is a deficient number, since it is larger than the sum of its proper divisors (1).

428993959 is an equidigital number, since it uses as much as digits as its factorization.

428993959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6298560, while the sum is 58.

The square root of 428993959 is about 20712.1693455804. The cubic root of 428993959 is about 754.1951330966.

It can be divided in two parts, 42 and 8993959, that added together give a square (8994001 = 2999²).

The spelling of 428993959 in words is "four hundred twenty-eight million, nine hundred ninety-three thousand, nine hundred fifty-nine".