1641850709 has 2 divisors, whose sum is σ = 1641850710. Its totient is φ = 1641850708.

The previous prime is 1641850703. The next prime is 1641850711. The reversal of 1641850709 is 9070581461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1630140625 + 11710084 = 40375^2 + 3422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1641850709 is a prime.

Together with 1641850711, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1641850703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820925354 + 820925355.

It is an arithmetic number, because the mean of its divisors is an integer number (820925355).

Almost surely, 2^1641850709 is an apocalyptic number.

It is an amenable number.

1641850709 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641850709 is an equidigital number, since it uses as much as digits as its factorization.

1641850709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 1641850709 is about 40519.7570204956. The cubic root of 1641850709 is about 1179.7171372648.

The spelling of 1641850709 in words is "one billion, six hundred forty-one million, eight hundred fifty thousand, seven hundred nine".