1609963 has 4 divisors (see below), whose sum is σ = 1647448. Its totient is φ = 1572480.

The previous prime is 1609913. The next prime is 1609969. The reversal of 1609963 is 3699061.

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-1609963 is a prime.

It is a super-2 number, since 2×1609963² = 5183961722738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1609969) 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, 18678 + ... + 18763.

It is an arithmetic number, because the mean of its divisors is an integer number (411862).

2^1609963 is an apocalyptic number.

1609963 is a deficient number, since it is larger than the sum of its proper divisors (37485).

1609963 is an equidigital number, since it uses as much as digits as its factorization.

1609963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37484.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 1609963 is about 1268.8431739187. The cubic root of 1609963 is about 117.2029739448.

The spelling of 1609963 in words is "one million, six hundred nine thousand, nine hundred sixty-three".