428583971 has 2 divisors, whose sum is σ = 428583972. Its totient is φ = 428583970.

The previous prime is 428583943. The next prime is 428583977. The reversal of 428583971 is 179385824.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428583971 - 2¹⁸ = 428321827 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (428583977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214291985 + 214291986.

It is an arithmetic number, because the mean of its divisors is an integer number (214291986).

Almost surely, 2^428583971 is an apocalyptic number.

428583971 is a deficient number, since it is larger than the sum of its proper divisors (1).

428583971 is an equidigital number, since it uses as much as digits as its factorization.

428583971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 47.

The square root of 428583971 is about 20702.2697064839. The cubic root of 428583971 is about 753.9547959822.

The spelling of 428583971 in words is "four hundred twenty-eight million, five hundred eighty-three thousand, nine hundred seventy-one".