631404133 has 2 divisors, whose sum is σ = 631404134. Its totient is φ = 631404132.

The previous prime is 631404127. The next prime is 631404139. The reversal of 631404133 is 331404136.

It is a happy number.

631404133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (631404127) and next prime (631404139).

It can be written as a sum of positive squares in only one way, i.e., 375468129 + 255936004 = 19377^2 + 15998^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631404133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 631404098 and 631404107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631404139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315702066 + 315702067.

It is an arithmetic number, because the mean of its divisors is an integer number (315702067).

Almost surely, 2^631404133 is an apocalyptic number.

It is an amenable number.

631404133 is a deficient number, since it is larger than the sum of its proper divisors (1).

631404133 is an equidigital number, since it uses as much as digits as its factorization.

631404133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 631404133 is about 25127.7562269296. The cubic root of 631404133 is about 857.8982991009.

Adding to 631404133 its reverse (331404136), we get a palindrome (962808269).

The spelling of 631404133 in words is "six hundred thirty-one million, four hundred four thousand, one hundred thirty-three".