633161421 has 16 divisors (see below), whose sum is σ = 945408000. Its totient is φ = 418781664.

The previous prime is 633161407. The next prime is 633161443. The reversal of 633161421 is 124161336.

633161421 is a `hidden beast` number, since 633 + 1 + 6 + 1 + 4 + 21 = 666.

It is not a de Polignac number, because 633161421 - 2⁶ = 633161357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (633161461) by changing a digit.

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, 88896 + ... + 95753.

It is an arithmetic number, because the mean of its divisors is an integer number (59088000).

Almost surely, 2^633161421 is an apocalyptic number.

It is an amenable number.

633161421 is a deficient number, since it is larger than the sum of its proper divisors (312246579).

633161421 is a wasteful number, since it uses less digits than its factorization.

633161421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184785 (or 184779 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 633161421 is about 25162.6990007034. The cubic root of 633161421 is about 858.6934464387.

The spelling of 633161421 in words is "six hundred thirty-three million, one hundred sixty-one thousand, four hundred twenty-one".