428937919 has 2 divisors, whose sum is σ = 428937920. Its totient is φ = 428937918.

The previous prime is 428937913. The next prime is 428937937. The reversal of 428937919 is 919739824.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428937919 - 2⁷ = 428937791 is a prime.

It is a super-2 number, since 2×428937919² = 367975476712101122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428937913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214468959 + 214468960.

It is an arithmetic number, because the mean of its divisors is an integer number (214468960).

Almost surely, 2^428937919 is an apocalyptic number.

428937919 is a deficient number, since it is larger than the sum of its proper divisors (1).

428937919 is an equidigital number, since it uses as much as digits as its factorization.

428937919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 52.

The square root of 428937919 is about 20710.8164735242. The cubic root of 428937919 is about 754.1622911922.

The spelling of 428937919 in words is "four hundred twenty-eight million, nine hundred thirty-seven thousand, nine hundred nineteen".