1641219379 has 2 divisors, whose sum is σ = 1641219380. Its totient is φ = 1641219378.

The previous prime is 1641219277. The next prime is 1641219421. The reversal of 1641219379 is 9739121461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1641219379 - 2⁹ = 1641218867 is a prime.

It is not a weakly prime, because it can be changed into another prime (1641219479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820609689 + 820609690.

It is an arithmetic number, because the mean of its divisors is an integer number (820609690).

Almost surely, 2^1641219379 is an apocalyptic number.

1641219379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641219379 is an equidigital number, since it uses as much as digits as its factorization.

1641219379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 43.

The square root of 1641219379 is about 40511.9658742945. The cubic root of 1641219379 is about 1179.5659082686.

The spelling of 1641219379 in words is "one billion, six hundred forty-one million, two hundred nineteen thousand, three hundred seventy-nine".