428171311 has 2 divisors, whose sum is σ = 428171312. Its totient is φ = 428171310.

The previous prime is 428171297. The next prime is 428171329. The reversal of 428171311 is 113171824.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428171311 is a prime.

It is a Chen prime.

It is equal to p_22756006 and since 428171311 and 22756006 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428171311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428171371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214085655 + 214085656.

It is an arithmetic number, because the mean of its divisors is an integer number (214085656).

Almost surely, 2^428171311 is an apocalyptic number.

428171311 is the 11061-st centered heptagonal number.

428171311 is a deficient number, since it is larger than the sum of its proper divisors (1).

428171311 is an equidigital number, since it uses as much as digits as its factorization.

428171311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 28.

The square root of 428171311 is about 20692.3007662270. The cubic root of 428171311 is about 753.7127377033.

The spelling of 428171311 in words is "four hundred twenty-eight million, one hundred seventy-one thousand, three hundred eleven".