1623120653 has 16 divisors (see below), whose sum is σ = 2038202880. Its totient is φ = 1255662000.

The previous prime is 1623120637. The next prime is 1623120671. The reversal of 1623120653 is 3560213261.

It is a cyclic number.

It is not a de Polignac number, because 1623120653 - 2⁴ = 1623120637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623120683) 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 15 ways as a sum of consecutive naturals, for example, 65123 + ... + 86528.

It is an arithmetic number, because the mean of its divisors is an integer number (127387680).

Almost surely, 2^1623120653 is an apocalyptic number.

It is an amenable number.

1623120653 is a deficient number, since it is larger than the sum of its proper divisors (415082227).

1623120653 is a wasteful number, since it uses less digits than its factorization.

1623120653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151808.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 1623120653 is about 40287.9715672060. The cubic root of 1623120653 is about 1175.2139409442.

The spelling of 1623120653 in words is "one billion, six hundred twenty-three million, one hundred twenty thousand, six hundred fifty-three".