428181583 has 2 divisors, whose sum is σ = 428181584. Its totient is φ = 428181582.

The previous prime is 428181569. The next prime is 428181629. The reversal of 428181583 is 385181824.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428181583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428181503) 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, 214090791 + 214090792.

It is an arithmetic number, because the mean of its divisors is an integer number (214090792).

Almost surely, 2^428181583 is an apocalyptic number.

428181583 is a deficient number, since it is larger than the sum of its proper divisors (1).

428181583 is an equidigital number, since it uses as much as digits as its factorization.

428181583 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61440, while the sum is 40.

The square root of 428181583 is about 20692.5489729999. The cubic root of 428181583 is about 753.7187649445.

The spelling of 428181583 in words is "four hundred twenty-eight million, one hundred eighty-one thousand, five hundred eighty-three".