428971857929 has 4 divisors (see below), whose sum is σ = 438098918784. Its totient is φ = 419844797076.

The previous prime is 428971857911. The next prime is 428971857947. The reversal of 428971857929 is 929758179824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (428971857911) and next prime (428971857947).

It is a cyclic number.

It is not a de Polignac number, because 428971857929 - 2²⁰ = 428970809353 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (428971857959) 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 in 3 ways as a sum of consecutive naturals, for example, 4563530357 + ... + 4563530450.

It is an arithmetic number, because the mean of its divisors is an integer number (109524729696).

Almost surely, 2^428971857929 is an apocalyptic number.

It is an amenable number.

428971857929 is a deficient number, since it is larger than the sum of its proper divisors (9127060855).

428971857929 is an equidigital number, since it uses as much as digits as its factorization.

428971857929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9127060854.

The product of its digits is 182891520, while the sum is 71.

The spelling of 428971857929 in words is "four hundred twenty-eight billion, nine hundred seventy-one million, eight hundred fifty-seven thousand, nine hundred twenty-nine".