428724041 has 2 divisors, whose sum is σ = 428724042. Its totient is φ = 428724040.

The previous prime is 428724029. The next prime is 428724047. The reversal of 428724041 is 140427824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 425555641 + 3168400 = 20629^2 + 1780^2 .

It is a cyclic number.

It is not a de Polignac number, because 428724041 - 2²² = 424529737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 428723989 and 428724007.

It is not a weakly prime, because it can be changed into another prime (428724047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214362020 + 214362021.

It is an arithmetic number, because the mean of its divisors is an integer number (214362021).

Almost surely, 2^428724041 is an apocalyptic number.

It is an amenable number.

428724041 is a deficient number, since it is larger than the sum of its proper divisors (1).

428724041 is an equidigital number, since it uses as much as digits as its factorization.

428724041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14336, while the sum is 32.

The square root of 428724041 is about 20705.6523925232. The cubic root of 428724041 is about 754.0369229809.

The spelling of 428724041 in words is "four hundred twenty-eight million, seven hundred twenty-four thousand, forty-one".