1625663 has 8 divisors (see below), whose sum is σ = 1827168. Its totient is φ = 1435104.

The previous prime is 1625647. The next prime is 1625677. The reversal of 1625663 is 3665261.

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

It is a cyclic number.

It is not a de Polignac number, because 1625663 - 2⁴ = 1625647 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625263) 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 7 ways as a sum of consecutive naturals, for example, 2420 + ... + 3017.

It is an arithmetic number, because the mean of its divisors is an integer number (228396).

2^1625663 is an apocalyptic number.

1625663 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1625663 is a deficient number, since it is larger than the sum of its proper divisors (201505).

1625663 is a wasteful number, since it uses less digits than its factorization.

1625663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5473.

The product of its digits is 6480, while the sum is 29.

The square root of 1625663 is about 1275.0149018737. The cubic root of 1625663 is about 117.5827212879.

The spelling of 1625663 in words is "one million, six hundred twenty-five thousand, six hundred sixty-three".