1641075379 has 2 divisors, whose sum is σ = 1641075380. Its totient is φ = 1641075378.

The previous prime is 1641075377. The next prime is 1641075431. The reversal of 1641075379 is 9735701461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1641075379 - 2¹ = 1641075377 is a prime.

Together with 1641075377, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1641075377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820537689 + 820537690.

It is an arithmetic number, because the mean of its divisors is an integer number (820537690).

Almost surely, 2^1641075379 is an apocalyptic number.

1641075379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641075379 is an equidigital number, since it uses as much as digits as its factorization.

1641075379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 1641075379 is about 40510.1885826270. The cubic root of 1641075379 is about 1179.5314090296.

The spelling of 1641075379 in words is "one billion, six hundred forty-one million, seventy-five thousand, three hundred seventy-nine".