633945 has 16 divisors (see below), whose sum is σ = 1092672. Its totient is φ = 312000.

The previous prime is 633943. The next prime is 633953. The reversal of 633945 is 549336.

It is a happy number.

633945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 633945 - 2¹ = 633943 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (633943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1431 + ... + 1820.

It is an arithmetic number, because the mean of its divisors is an integer number (68292).

2⁶³³⁹⁴⁵ is an apocalyptic number.

633945 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

633945 is a deficient number, since it is larger than the sum of its proper divisors (458727).

633945 is a wasteful number, since it uses less digits than its factorization.

633945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3272.

The product of its digits is 9720, while the sum is 30.

The square root of 633945 is about 796.2066314720. The cubic root of 633945 is about 85.9047530328.

The spelling of 633945 in words is "six hundred thirty-three thousand, nine hundred forty-five".