189621633 has 16 divisors (see below), whose sum is σ = 268620480. Its totient is φ = 118754496.

The previous prime is 189621631. The next prime is 189621643. The reversal of 189621633 is 336126981.

It is not a de Polignac number, because 189621633 - 2¹ = 189621631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189621591 and 189621600.

It is not an unprimeable number, because it can be changed into a prime (189621631) 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 15 ways as a sum of consecutive naturals, for example, 26235 + ... + 32672.

It is an arithmetic number, because the mean of its divisors is an integer number (16788780).

Almost surely, 2^189621633 is an apocalyptic number.

It is an amenable number.

189621633 is a deficient number, since it is larger than the sum of its proper divisors (78998847).

189621633 is a wasteful number, since it uses less digits than its factorization.

189621633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58976.

The product of its digits is 46656, while the sum is 39.

The square root of 189621633 is about 13770.3170987454. The cubic root of 189621633 is about 574.5078415019.

The spelling of 189621633 in words is "one hundred eighty-nine million, six hundred twenty-one thousand, six hundred thirty-three".