3198242809 has 2 divisors, whose sum is σ = 3198242810. Its totient is φ = 3198242808.

The previous prime is 3198242771. The next prime is 3198242881. The reversal of 3198242809 is 9082428913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3037663225 + 160579584 = 55115^2 + 12672^2 .

It is a cyclic number.

It is not a de Polignac number, because 3198242809 - 2³¹ = 1050759161 is a prime.

It is not a weakly prime, because it can be changed into another prime (3198242899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1599121404 + 1599121405.

It is an arithmetic number, because the mean of its divisors is an integer number (1599121405).

Almost surely, 2^3198242809 is an apocalyptic number.

It is an amenable number.

3198242809 is a deficient number, since it is larger than the sum of its proper divisors (1).

3198242809 is an equidigital number, since it uses as much as digits as its factorization.

3198242809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 3198242809 is about 56553.0088412633. The cubic root of 3198242809 is about 1473.3428189446.

The spelling of 3198242809 in words is "three billion, one hundred ninety-eight million, two hundred forty-two thousand, eight hundred nine".