1428650969 has 2 divisors, whose sum is σ = 1428650970. Its totient is φ = 1428650968.

The previous prime is 1428650939. The next prime is 1428650989. The reversal of 1428650969 is 9690568241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1420385344 + 8265625 = 37688^2 + 2875^2 .

It is a cyclic number.

It is not a de Polignac number, because 1428650969 - 2²⁴ = 1411873753 is a prime.

It is a super-2 number, since 2×1428650969² = 4082087182449277922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1428650929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714325484 + 714325485.

It is an arithmetic number, because the mean of its divisors is an integer number (714325485).

Almost surely, 2^1428650969 is an apocalyptic number.

It is an amenable number.

1428650969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428650969 is an equidigital number, since it uses as much as digits as its factorization.

1428650969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 50.

The square root of 1428650969 is about 37797.4995072425. The cubic root of 1428650969 is about 1126.2687825781.

The spelling of 1428650969 in words is "one billion, four hundred twenty-eight million, six hundred fifty thousand, nine hundred sixty-nine".