1641329819 has 2 divisors, whose sum is σ = 1641329820. Its totient is φ = 1641329818.

The previous prime is 1641329699. The next prime is 1641329831. The reversal of 1641329819 is 9189231461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1641329819 is a prime.

It is a super-2 number, since 2×1641329819² = 5387927149477145522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1641329819.

It is not a weakly prime, because it can be changed into another prime (1641329419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820664909 + 820664910.

It is an arithmetic number, because the mean of its divisors is an integer number (820664910).

Almost surely, 2^1641329819 is an apocalyptic number.

1641329819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641329819 is an equidigital number, since it uses as much as digits as its factorization.

1641329819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 44.

The square root of 1641329819 is about 40513.3289054356. The cubic root of 1641329819 is about 1179.5923659010.

The spelling of 1641329819 in words is "one billion, six hundred forty-one million, three hundred twenty-nine thousand, eight hundred nineteen".