634520441 has 2 divisors, whose sum is σ = 634520442. Its totient is φ = 634520440.

The previous prime is 634520357. The next prime is 634520443. The reversal of 634520441 is 144025436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 627252025 + 7268416 = 25045^2 + 2696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634520441 is a prime.

Together with 634520443, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (634520443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317260220 + 317260221.

It is an arithmetic number, because the mean of its divisors is an integer number (317260221).

Almost surely, 2^634520441 is an apocalyptic number.

It is an amenable number.

634520441 is a deficient number, since it is larger than the sum of its proper divisors (1).

634520441 is an equidigital number, since it uses as much as digits as its factorization.

634520441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 634520441 is about 25189.6891802976. The cubic root of 634520441 is about 859.3073749912.

Adding to 634520441 its reverse (144025436), we get a palindrome (778545877).

The spelling of 634520441 in words is "six hundred thirty-four million, five hundred twenty thousand, four hundred forty-one".