428717143 has 4 divisors (see below), whose sum is σ = 431085928. Its totient is φ = 426348360.

The previous prime is 428717131. The next prime is 428717147. The reversal of 428717143 is 341717824.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428717143 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 (428717147) 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, 1184121 + ... + 1184482.

It is an arithmetic number, because the mean of its divisors is an integer number (107771482).

Almost surely, 2^428717143 is an apocalyptic number.

428717143 is a deficient number, since it is larger than the sum of its proper divisors (2368785).

428717143 is a wasteful number, since it uses less digits than its factorization.

428717143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2368784.

The product of its digits is 37632, while the sum is 37.

The square root of 428717143 is about 20705.4858189804. The cubic root of 428717143 is about 754.0328789074.

The spelling of 428717143 in words is "four hundred twenty-eight million, seven hundred seventeen thousand, one hundred forty-three".