1623442723 has 4 divisors (see below), whose sum is σ = 1855363120. Its totient is φ = 1391522328.

The previous prime is 1623442699. The next prime is 1623442729. The reversal of 1623442723 is 3272443261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3272443261 = 173 ⋅18915857.

It is not a de Polignac number, because 1623442723 - 2¹³ = 1623434531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1623442729) 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, 115960188 + ... + 115960201.

It is an arithmetic number, because the mean of its divisors is an integer number (463840780).

Almost surely, 2^1623442723 is an apocalyptic number.

1623442723 is a deficient number, since it is larger than the sum of its proper divisors (231920397).

1623442723 is an equidigital number, since it uses as much as digits as its factorization.

1623442723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231920396.

The product of its digits is 48384, while the sum is 34.

The square root of 1623442723 is about 40291.9684676736. The cubic root of 1623442723 is about 1175.2916669636.

Adding to 1623442723 its reverse (3272443261), we get a palindrome (4895885984).

The spelling of 1623442723 in words is "one billion, six hundred twenty-three million, four hundred forty-two thousand, seven hundred twenty-three".