428823491 has 2 divisors, whose sum is σ = 428823492. Its totient is φ = 428823490.

The previous prime is 428823463. The next prime is 428823511. The reversal of 428823491 is 194328824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428823491 - 2¹⁴ = 428807107 is a prime.

It is not a weakly prime, because it can be changed into another prime (428823091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214411745 + 214411746.

It is an arithmetic number, because the mean of its divisors is an integer number (214411746).

Almost surely, 2^428823491 is an apocalyptic number.

428823491 is a deficient number, since it is larger than the sum of its proper divisors (1).

428823491 is an equidigital number, since it uses as much as digits as its factorization.

428823491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 41.

The square root of 428823491 is about 20708.0537714195. The cubic root of 428823491 is about 754.0952224674.

The spelling of 428823491 in words is "four hundred twenty-eight million, eight hundred twenty-three thousand, four hundred ninety-one".