1623648623 has 4 divisors (see below), whose sum is σ = 1625749848. Its totient is φ = 1621547400.

The previous prime is 1623648619. The next prime is 1623648703. The reversal of 1623648623 is 3268463261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3268463261 = 7 ⋅466923323.

It is a cyclic number.

It is not a de Polignac number, because 1623648623 - 2² = 1623648619 is a prime.

It is a super-2 number, since 2×1623648623² = 5272469701939592258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623648823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1049453 + ... + 1050998.

It is an arithmetic number, because the mean of its divisors is an integer number (406437462).

Almost surely, 2^1623648623 is an apocalyptic number.

1623648623 is a deficient number, since it is larger than the sum of its proper divisors (2101225).

1623648623 is an equidigital number, since it uses as much as digits as its factorization.

1623648623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101224.

The product of its digits is 248832, while the sum is 41.

The square root of 1623648623 is about 40294.5234864491. The cubic root of 1623648623 is about 1175.3413519778.

The spelling of 1623648623 in words is "one billion, six hundred twenty-three million, six hundred forty-eight thousand, six hundred twenty-three".