428013899 has 2 divisors, whose sum is σ = 428013900. Its totient is φ = 428013898.

The previous prime is 428013853. The next prime is 428013917. The reversal of 428013899 is 998310824.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428013899 - 2⁸ = 428013643 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (428013809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214006949 + 214006950.

It is an arithmetic number, because the mean of its divisors is an integer number (214006950).

Almost surely, 2^428013899 is an apocalyptic number.

428013899 is a deficient number, since it is larger than the sum of its proper divisors (1).

428013899 is an equidigital number, since it uses as much as digits as its factorization.

428013899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 428013899 is about 20688.4967796116. The cubic root of 428013899 is about 753.6203619270.

The spelling of 428013899 in words is "four hundred twenty-eight million, thirteen thousand, eight hundred ninety-nine".