3398207521 has 2 divisors, whose sum is σ = 3398207522. Its totient is φ = 3398207520.

The previous prime is 3398207447. The next prime is 3398207567. The reversal of 3398207521 is 1257028933.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3393645025 + 4562496 = 58255^2 + 2136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3398207521 is a prime.

It is not a weakly prime, because it can be changed into another prime (3398207221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1699103760 + 1699103761.

It is an arithmetic number, because the mean of its divisors is an integer number (1699103761).

Almost surely, 2^3398207521 is an apocalyptic number.

It is an amenable number.

3398207521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3398207521 is an equidigital number, since it uses as much as digits as its factorization.

3398207521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 3398207521 is about 58294.1465414839. The cubic root of 3398207521 is about 1503.4303006377.

The spelling of 3398207521 in words is "three billion, three hundred ninety-eight million, two hundred seven thousand, five hundred twenty-one".