1028009849 has 2 divisors, whose sum is σ = 1028009850. Its totient is φ = 1028009848.

The previous prime is 1028009831. The next prime is 1028009861. The reversal of 1028009849 is 9489008201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1021249849 + 6760000 = 31957^2 + 2600^2 .

It is a cyclic number.

It is not a de Polignac number, because 1028009849 - 2¹² = 1028005753 is a prime.

It is not a weakly prime, because it can be changed into another prime (1028009249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514004924 + 514004925.

It is an arithmetic number, because the mean of its divisors is an integer number (514004925).

Almost surely, 2^1028009849 is an apocalyptic number.

It is an amenable number.

1028009849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028009849 is an equidigital number, since it uses as much as digits as its factorization.

1028009849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 1028009849 is about 32062.5926743300. The cubic root of 1028009849 is about 1009.2507756001.

The spelling of 1028009849 in words is "one billion, twenty-eight million, nine thousand, eight hundred forty-nine".