3491839561 has 4 divisors (see below), whose sum is σ = 3990673792. Its totient is φ = 2993005332.

The previous prime is 3491839543. The next prime is 3491839567. The reversal of 3491839561 is 1659381943.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3491839561 - 2¹⁹ = 3491315273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3491839567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249417105 + ... + 249417118.

It is an arithmetic number, because the mean of its divisors is an integer number (997668448).

Almost surely, 2^3491839561 is an apocalyptic number.

It is an amenable number.

3491839561 is a deficient number, since it is larger than the sum of its proper divisors (498834231).

3491839561 is an equidigital number, since it uses as much as digits as its factorization.

3491839561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498834230.

The product of its digits is 699840, while the sum is 49.

The square root of 3491839561 is about 59091.7892858221. The cubic root of 3491839561 is about 1517.1135724800.

The spelling of 3491839561 in words is "three billion, four hundred ninety-one million, eight hundred thirty-nine thousand, five hundred sixty-one".