1613923 has 4 divisors (see below), whose sum is σ = 1616560. Its totient is φ = 1611288.

The previous prime is 1613921. The next prime is 1613947. The reversal of 1613923 is 3293161.

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

It is a cyclic number.

It is not a de Polignac number, because 1613923 - 2¹ = 1613921 is a prime.

It is a Duffinian number.

1613923 is a lucky number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1613921) 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, 133 + ... + 1801.

It is an arithmetic number, because the mean of its divisors is an integer number (404140).

2^1613923 is an apocalyptic number.

1613923 is a deficient number, since it is larger than the sum of its proper divisors (2637).

1613923 is an equidigital number, since it uses as much as digits as its factorization.

1613923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2636.

The product of its digits is 972, while the sum is 25.

The square root of 1613923 is about 1270.4026920626. The cubic root of 1613923 is about 117.2989893529.

The spelling of 1613923 in words is "one million, six hundred thirteen thousand, nine hundred twenty-three".