1663459739 has 2 divisors, whose sum is σ = 1663459740. Its totient is φ = 1663459738.

The previous prime is 1663459717. The next prime is 1663459753. The reversal of 1663459739 is 9379543661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1663459739 is a prime.

It is not a weakly prime, because it can be changed into another prime (1663459939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831729869 + 831729870.

It is an arithmetic number, because the mean of its divisors is an integer number (831729870).

Almost surely, 2^1663459739 is an apocalyptic number.

1663459739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663459739 is an equidigital number, since it uses as much as digits as its factorization.

1663459739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3674160, while the sum is 53.

The square root of 1663459739 is about 40785.5334524387. The cubic root of 1663459739 is about 1184.8701665988.

The spelling of 1663459739 in words is "one billion, six hundred sixty-three million, four hundred fifty-nine thousand, seven hundred thirty-nine".