1949663 has 4 divisors (see below), whose sum is σ = 1995048. Its totient is φ = 1904280.

The previous prime is 1949657. The next prime is 1949707. The reversal of 1949663 is 3669491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1949663 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 (1940663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22628 + ... + 22713.

It is an arithmetic number, because the mean of its divisors is an integer number (498762).

2^1949663 is an apocalyptic number.

1949663 is a deficient number, since it is larger than the sum of its proper divisors (45385).

1949663 is an equidigital number, since it uses as much as digits as its factorization.

1949663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45384.

The product of its digits is 34992, while the sum is 38.

The square root of 1949663 is about 1396.3033338068. The cubic root of 1949663 is about 124.9261003193.

The spelling of 1949663 in words is "one million, nine hundred forty-nine thousand, six hundred sixty-three".