633983945 has 32 divisors (see below), whose sum is σ = 900218880. Its totient is φ = 419440320.

The previous prime is 633983899. The next prime is 633984037. The reversal of 633983945 is 549389336.

It is not a de Polignac number, because 633983945 - 2⁸ = 633983689 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 633983893 and 633983902.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 479996 + ... + 481314.

It is an arithmetic number, because the mean of its divisors is an integer number (28131840).

Almost surely, 2^633983945 is an apocalyptic number.

It is an amenable number.

633983945 is a deficient number, since it is larger than the sum of its proper divisors (266234935).

633983945 is a wasteful number, since it uses less digits than its factorization.

633983945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805.

The product of its digits is 2099520, while the sum is 50.

The square root of 633983945 is about 25179.0378092571. The cubic root of 633983945 is about 859.0651211922.

The spelling of 633983945 in words is "six hundred thirty-three million, nine hundred eighty-three thousand, nine hundred forty-five".