1663954 has 8 divisors (see below), whose sum is σ = 2515968. Its totient is φ = 825300.

The previous prime is 1663951. The next prime is 1663967. The reversal of 1663954 is 4593661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1663951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3022 + ... + 3529.

It is an arithmetic number, because the mean of its divisors is an integer number (314496).

2^1663954 is an apocalyptic number.

1663954 is a deficient number, since it is larger than the sum of its proper divisors (852014).

1663954 is a wasteful number, since it uses less digits than its factorization.

1663954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6680.

The product of its digits is 19440, while the sum is 34.

The square root of 1663954 is about 1289.9434096114. The cubic root of 1663954 is about 118.4987507806.

The spelling of 1663954 in words is "one million, six hundred sixty-three thousand, nine hundred fifty-four".