428549111 has 2 divisors, whose sum is σ = 428549112. Its totient is φ = 428549110.

The previous prime is 428549029. The next prime is 428549119. The reversal of 428549111 is 111945824.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428549111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428549119) 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, 214274555 + 214274556.

It is an arithmetic number, because the mean of its divisors is an integer number (214274556).

Almost surely, 2^428549111 is an apocalyptic number.

428549111 is a deficient number, since it is larger than the sum of its proper divisors (1).

428549111 is an equidigital number, since it uses as much as digits as its factorization.

428549111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 35.

The square root of 428549111 is about 20701.4277526938. The cubic root of 428549111 is about 753.9343537985.

The spelling of 428549111 in words is "four hundred twenty-eight million, five hundred forty-nine thousand, one hundred eleven".