194421623 has 16 divisors (see below), whose sum is σ = 223776000. Its totient is φ = 167057280.

The previous prime is 194421613. The next prime is 194421709. The reversal of 194421623 is 326124491.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194421623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 194421623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194421613) 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, 124415 + ... + 125967.

It is an arithmetic number, because the mean of its divisors is an integer number (13986000).

Almost surely, 2^194421623 is an apocalyptic number.

194421623 is a deficient number, since it is larger than the sum of its proper divisors (29354377).

194421623 is a wasteful number, since it uses less digits than its factorization.

194421623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182.

The product of its digits is 10368, while the sum is 32.

The square root of 194421623 is about 13943.5154462567. The cubic root of 194421623 is about 579.3151081327.

The spelling of 194421623 in words is "one hundred ninety-four million, four hundred twenty-one thousand, six hundred twenty-three".