633968421 has 8 divisors (see below), whose sum is σ = 889780320. Its totient is φ = 400401072.

The previous prime is 633968411. The next prime is 633968431. The reversal of 633968421 is 124869336.

633968421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (633968411) and next prime (633968431).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 633968421 - 2¹⁴ = 633952037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (633968411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5561070 + ... + 5561183.

It is an arithmetic number, because the mean of its divisors is an integer number (111222540).

Almost surely, 2^633968421 is an apocalyptic number.

It is an amenable number.

633968421 is a deficient number, since it is larger than the sum of its proper divisors (255811899).

633968421 is a wasteful number, since it uses less digits than its factorization.

633968421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11122275.

The product of its digits is 186624, while the sum is 42.

The square root of 633968421 is about 25178.7295350659. The cubic root of 633968421 is about 859.0581093239.

It can be divided in two parts, 63396 and 8421, that added together give a palindrome (71817).

The spelling of 633968421 in words is "six hundred thirty-three million, nine hundred sixty-eight thousand, four hundred twenty-one".