428123569087 has 4 divisors (see below), whose sum is σ = 428589428080. Its totient is φ = 427657710096.

The previous prime is 428123569051. The next prime is 428123569099. The reversal of 428123569087 is 780965321824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428123569087 - 2⁷ = 428123568959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428123569007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232928118 + ... + 232929955.

It is an arithmetic number, because the mean of its divisors is an integer number (107147357020).

It is a 1-persistent number, because it is pandigital, but 2⋅428123569087 = 856247138174 is not.

Almost surely, 2^428123569087 is an apocalyptic number.

428123569087 is a deficient number, since it is larger than the sum of its proper divisors (465858993).

428123569087 is an equidigital number, since it uses as much as digits as its factorization.

428123569087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465858992.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 428123569087 in words is "four hundred twenty-eight billion, one hundred twenty-three million, five hundred sixty-nine thousand, eighty-seven".