1663713 has 16 divisors (see below), whose sum is σ = 2523840. Its totient is φ = 1082592.

The previous prime is 1663709. The next prime is 1663721. The reversal of 1663713 is 3173661.

1663713 is a `hidden beast` number, since 16 + 637 + 13 = 666.

It is not a de Polignac number, because 1663713 - 2² = 1663709 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1663703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 445 + ... + 1877.

It is an arithmetic number, because the mean of its divisors is an integer number (157740).

2^1663713 is an apocalyptic number.

It is an amenable number.

1663713 is a deficient number, since it is larger than the sum of its proper divisors (860127).

1663713 is a wasteful number, since it uses less digits than its factorization.

1663713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485 (or 1479 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 1663713 is about 1289.8499912781. The cubic root of 1663713 is about 118.4930295531.

The spelling of 1663713 in words is "one million, six hundred sixty-three thousand, seven hundred thirteen".