428387747 has 2 divisors, whose sum is σ = 428387748. Its totient is φ = 428387746.

The previous prime is 428387693. The next prime is 428387779. The reversal of 428387747 is 747783824.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428387747 - 2¹⁶ = 428322211 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 428387695 and 428387704.

It is not a weakly prime, because it can be changed into another prime (428387647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214193873 + 214193874.

It is an arithmetic number, because the mean of its divisors is an integer number (214193874).

Almost surely, 2^428387747 is an apocalyptic number.

428387747 is a deficient number, since it is larger than the sum of its proper divisors (1).

428387747 is an equidigital number, since it uses as much as digits as its factorization.

428387747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2107392, while the sum is 50.

The square root of 428387747 is about 20697.5299734050. The cubic root of 428387747 is about 753.8397142091.

The spelling of 428387747 in words is "four hundred twenty-eight million, three hundred eighty-seven thousand, seven hundred forty-seven".