1641711959 has 2 divisors, whose sum is σ = 1641711960. Its totient is φ = 1641711958.

The previous prime is 1641711943. The next prime is 1641711979. The reversal of 1641711959 is 9591171461.

It is a weak prime.

It is an emirp because it is prime and its reverse (9591171461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1641711959 - 2⁴ = 1641711943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1641711979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820855979 + 820855980.

It is an arithmetic number, because the mean of its divisors is an integer number (820855980).

Almost surely, 2^1641711959 is an apocalyptic number.

1641711959 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641711959 is an equidigital number, since it uses as much as digits as its factorization.

1641711959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 44.

The square root of 1641711959 is about 40518.0448565821. The cubic root of 1641711959 is about 1179.6839043683.

The spelling of 1641711959 in words is "one billion, six hundred forty-one million, seven hundred eleven thousand, nine hundred fifty-nine".