1663309713 has 16 divisors (see below), whose sum is σ = 2411994816. Its totient is φ = 1013438400.

The previous prime is 1663309679. The next prime is 1663309727. The reversal of 1663309713 is 3179033661.

It is not a de Polignac number, because 1663309713 - 2¹² = 1663305617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1663309763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207195 + ... + 215072.

It is an arithmetic number, because the mean of its divisors is an integer number (150749676).

Almost surely, 2^1663309713 is an apocalyptic number.

1663309713 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1663309713 is a deficient number, since it is larger than the sum of its proper divisors (748685103).

1663309713 is a wasteful number, since it uses less digits than its factorization.

1663309713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422384.

The product of its (nonzero) digits is 61236, while the sum is 39.

The square root of 1663309713 is about 40783.6942049148. The cubic root of 1663309713 is about 1184.8345447215.

The spelling of 1663309713 in words is "one billion, six hundred sixty-three million, three hundred nine thousand, seven hundred thirteen".