633278313 has 12 divisors (see below), whose sum is σ = 915644548. Its totient is φ = 421765920.

The previous prime is 633278279. The next prime is 633278357. The reversal of 633278313 is 313872336.

It is a happy number.

633278313 is a `hidden beast` number, since 6 + 332 + 7 + 8 + 313 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 293539689 + 339738624 = 17133^2 + 18432^2 .

It is not a de Polignac number, because 633278313 - 2⁸ = 633278057 is a prime.

It is a super-2 number, since 2×633278313² = 802082843432251938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (633278363) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25270 + ... + 43647.

Almost surely, 2^633278313 is an apocalyptic number.

It is an amenable number.

633278313 is a deficient number, since it is larger than the sum of its proper divisors (282366235).

633278313 is a wasteful number, since it uses less digits than its factorization.

633278313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69944 (or 69941 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 633278313 is about 25165.0216173164. The cubic root of 633278313 is about 858.7462861595.

The spelling of 633278313 in words is "six hundred thirty-three million, two hundred seventy-eight thousand, three hundred thirteen".