1722663 has 12 divisors (see below), whose sum is σ = 2500888. Its totient is φ = 1142640.

The previous prime is 1722653. The next prime is 1722667. The reversal of 1722663 is 3662271.

It is a happy number.

It is not a de Polignac number, because 1722663 - 2⁴ = 1722647 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 (1722667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2148 + ... + 2838.

2^1722663 is an apocalyptic number.

1722663 is a deficient number, since it is larger than the sum of its proper divisors (778225).

1722663 is a wasteful number, since it uses less digits than its factorization.

1722663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974 (or 971 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 1722663 is about 1312.5025714261. The cubic root of 1722663 is about 119.8763309268.

The spelling of 1722663 in words is "one million, seven hundred twenty-two thousand, six hundred sixty-three".