634223401 has 24 divisors (see below), whose sum is σ = 785785280. Its totient is φ = 499693536.

The previous prime is 634223399. The next prime is 634223431. The reversal of 634223401 is 104322436.

634223401 is nontrivially palindromic in base 6.

It is not a de Polignac number, because 634223401 - 2¹ = 634223399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634223431) 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 23 ways as a sum of consecutive naturals, for example, 1766460 + ... + 1766818.

Almost surely, 2^634223401 is an apocalyptic number.

It is an amenable number.

634223401 is a deficient number, since it is larger than the sum of its proper divisors (151561879).

634223401 is an equidigital number, since it uses as much as digits as its factorization.

634223401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 634223401 is about 25183.7924268765. The cubic root of 634223401 is about 859.1732639961.

Adding to 634223401 its reverse (104322436), we get a palindrome (738545837).

The spelling of 634223401 in words is "six hundred thirty-four million, two hundred twenty-three thousand, four hundred one".