1663602379 has 2 divisors, whose sum is σ = 1663602380. Its totient is φ = 1663602378.

The previous prime is 1663602373. The next prime is 1663602403. The reversal of 1663602379 is 9732063661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1663602379 - 2²¹ = 1661505227 is a prime.

It is not a weakly prime, because it can be changed into another prime (1663602373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831801189 + 831801190.

It is an arithmetic number, because the mean of its divisors is an integer number (831801190).

Almost surely, 2^1663602379 is an apocalyptic number.

1663602379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663602379 is an equidigital number, since it uses as much as digits as its factorization.

1663602379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 43.

The square root of 1663602379 is about 40787.2820741956. The cubic root of 1663602379 is about 1184.9040327726.

The spelling of 1663602379 in words is "one billion, six hundred sixty-three million, six hundred two thousand, three hundred seventy-nine".