1618923 has 4 divisors (see below), whose sum is σ = 2158568. Its totient is φ = 1079280.

The previous prime is 1618909. The next prime is 1618931. The reversal of 1618923 is 3298161.

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

It is not a de Polignac number, because 1618923 - 2⁵ = 1618891 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1618943) 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 3 ways as a sum of consecutive naturals, for example, 269818 + ... + 269823.

It is an arithmetic number, because the mean of its divisors is an integer number (539642).

2^1618923 is an apocalyptic number.

1618923 is a deficient number, since it is larger than the sum of its proper divisors (539645).

1618923 is an equidigital number, since it uses as much as digits as its factorization.

1618923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539644.

The product of its digits is 2592, while the sum is 30.

The square root of 1618923 is about 1272.3690502366. The cubic root of 1618923 is about 117.4199968452.

The spelling of 1618923 in words is "one million, six hundred eighteen thousand, nine hundred twenty-three".