1663490983 has 32 divisors (see below), whose sum is σ = 2187233280. Its totient is φ = 1225692000.

The previous prime is 1663490963. The next prime is 1663490989. The reversal of 1663490983 is 3890943661.

It is a cyclic number.

It is not a de Polignac number, because 1663490983 - 2¹⁷ = 1663359911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663490989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1419988 + ... + 1421158.

It is an arithmetic number, because the mean of its divisors is an integer number (68351040).

Almost surely, 2^1663490983 is an apocalyptic number.

1663490983 is a deficient number, since it is larger than the sum of its proper divisors (523742297).

1663490983 is a wasteful number, since it uses less digits than its factorization.

1663490983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179.

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 1663490983 is about 40785.9164786082. The cubic root of 1663490983 is about 1184.8775848430.

The spelling of 1663490983 in words is "one billion, six hundred sixty-three million, four hundred ninety thousand, nine hundred eighty-three".