634502423 has 2 divisors, whose sum is σ = 634502424. Its totient is φ = 634502422.

The previous prime is 634502399. The next prime is 634502431. The reversal of 634502423 is 324205436.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634502423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634502443) 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 as a sum of consecutive naturals, namely, 317251211 + 317251212.

It is an arithmetic number, because the mean of its divisors is an integer number (317251212).

Almost surely, 2^634502423 is an apocalyptic number.

634502423 is a deficient number, since it is larger than the sum of its proper divisors (1).

634502423 is an equidigital number, since it uses as much as digits as its factorization.

634502423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 29.

The square root of 634502423 is about 25189.3315314242. The cubic root of 634502423 is about 859.2992412123.

Adding to 634502423 its reverse (324205436), we get a palindrome (958707859).

The spelling of 634502423 in words is "six hundred thirty-four million, five hundred two thousand, four hundred twenty-three".