631443601 has 2 divisors, whose sum is σ = 631443602. Its totient is φ = 631443600.

The previous prime is 631443559. The next prime is 631443611. The reversal of 631443601 is 106344136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 426381201 + 205062400 = 20649^2 + 14320^2 .

It is a cyclic number.

It is not a de Polignac number, because 631443601 - 2¹⁵ = 631410833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 631443601.

It is not a weakly prime, because it can be changed into another prime (631443611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315721800 + 315721801.

It is an arithmetic number, because the mean of its divisors is an integer number (315721801).

Almost surely, 2^631443601 is an apocalyptic number.

It is an amenable number.

631443601 is a deficient number, since it is larger than the sum of its proper divisors (1).

631443601 is an equidigital number, since it uses as much as digits as its factorization.

631443601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 631443601 is about 25128.5415613402. The cubic root of 631443601 is about 857.9161739837.

Adding to 631443601 its reverse (106344136), we get a palindrome (737787737).

The spelling of 631443601 in words is "six hundred thirty-one million, four hundred forty-three thousand, six hundred one".