633219945 has 16 divisors (see below), whose sum is σ = 1013523840. Its totient is φ = 337593344.

The previous prime is 633219931. The next prime is 633219989. The reversal of 633219945 is 549912336.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 633219945 - 2⁴ = 633219929 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 633219897 and 633219906.

It is an unprimeable number.

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, 46921 + ... + 58889.

It is an arithmetic number, because the mean of its divisors is an integer number (63345240).

Almost surely, 2^633219945 is an apocalyptic number.

It is an amenable number.

633219945 is a deficient number, since it is larger than the sum of its proper divisors (380303895).

633219945 is a wasteful number, since it uses less digits than its factorization.

633219945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15504.

The product of its digits is 174960, while the sum is 42.

The square root of 633219945 is about 25163.8618856486. The cubic root of 633219945 is about 858.7199023710.

The spelling of 633219945 in words is "six hundred thirty-three million, two hundred nineteen thousand, nine hundred forty-five".