631346641 has 2 divisors, whose sum is σ = 631346642. Its totient is φ = 631346640.

The previous prime is 631346633. The next prime is 631346699. The reversal of 631346641 is 146643136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 535228225 + 96118416 = 23135^2 + 9804^2 .

It is a cyclic number.

It is not a de Polignac number, because 631346641 - 2³ = 631346633 is a prime.

It is a super-2 number, since 2×631346641² = 797197162203965762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 631346597 and 631346606.

It is not a weakly prime, because it can be changed into another prime (631346621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315673320 + 315673321.

It is an arithmetic number, because the mean of its divisors is an integer number (315673321).

Almost surely, 2^631346641 is an apocalyptic number.

It is an amenable number.

631346641 is a deficient number, since it is larger than the sum of its proper divisors (1).

631346641 is an equidigital number, since it uses as much as digits as its factorization.

631346641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 34.

The square root of 631346641 is about 25126.6122069809. The cubic root of 631346641 is about 857.8722598953.

Adding to 631346641 its reverse (146643136), we get a palindrome (777989777).

The spelling of 631346641 in words is "six hundred thirty-one million, three hundred forty-six thousand, six hundred forty-one".