1048390309 has 2 divisors, whose sum is σ = 1048390310. Its totient is φ = 1048390308.

The previous prime is 1048390283. The next prime is 1048390313. The reversal of 1048390309 is 9030938401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1030089025 + 18301284 = 32095^2 + 4278^2 .

It is a cyclic number.

It is not a de Polignac number, because 1048390309 - 2¹⁷ = 1048259237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1048390349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 524195154 + 524195155.

It is an arithmetic number, because the mean of its divisors is an integer number (524195155).

Almost surely, 2^1048390309 is an apocalyptic number.

It is an amenable number.

1048390309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1048390309 is an equidigital number, since it uses as much as digits as its factorization.

1048390309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 1048390309 is about 32378.8558939318. The cubic root of 1048390309 is about 1015.8766994050.

The spelling of 1048390309 in words is "one billion, forty-eight million, three hundred ninety thousand, three hundred nine".