3499820561 has 2 divisors, whose sum is σ = 3499820562. Its totient is φ = 3499820560.

The previous prime is 3499820459. The next prime is 3499820591. The reversal of 3499820561 is 1650289943.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3324099025 + 175721536 = 57655^2 + 13256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3499820561 is a prime.

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 (3499820591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1749910280 + 1749910281.

It is an arithmetic number, because the mean of its divisors is an integer number (1749910281).

Almost surely, 2^3499820561 is an apocalyptic number.

It is an amenable number.

3499820561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3499820561 is an equidigital number, since it uses as much as digits as its factorization.

3499820561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 3499820561 is about 59159.2812752150. The cubic root of 3499820561 is about 1518.2685387092.

The spelling of 3499820561 in words is "three billion, four hundred ninety-nine million, eight hundred twenty thousand, five hundred sixty-one".