428039737 has 2 divisors, whose sum is σ = 428039738. Its totient is φ = 428039736.

The previous prime is 428039693. The next prime is 428039743. The reversal of 428039737 is 737930824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 426794281 + 1245456 = 20659^2 + 1116^2 .

It is a cyclic number.

It is not a de Polignac number, because 428039737 - 2⁷ = 428039609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 428039693 and 428039702.

It is not a weakly prime, because it can be changed into another prime (428039747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214019868 + 214019869.

It is an arithmetic number, because the mean of its divisors is an integer number (214019869).

Almost surely, 2^428039737 is an apocalyptic number.

It is an amenable number.

428039737 is a deficient number, since it is larger than the sum of its proper divisors (1).

428039737 is an equidigital number, since it uses as much as digits as its factorization.

428039737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 428039737 is about 20689.1212234836. The cubic root of 428039737 is about 753.6355262718.

The spelling of 428039737 in words is "four hundred twenty-eight million, thirty-nine thousand, seven hundred thirty-seven".