631106653 has 2 divisors, whose sum is σ = 631106654. Its totient is φ = 631106652.

The previous prime is 631106633. The next prime is 631106659. The reversal of 631106653 is 356601136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 467727129 + 163379524 = 21627^2 + 12782^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631106653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631106659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315553326 + 315553327.

It is an arithmetic number, because the mean of its divisors is an integer number (315553327).

Almost surely, 2^631106653 is an apocalyptic number.

It is an amenable number.

631106653 is a deficient number, since it is larger than the sum of its proper divisors (1).

631106653 is an equidigital number, since it uses as much as digits as its factorization.

631106653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 631106653 is about 25121.8361789102. The cubic root of 631106653 is about 857.7635477519.

Adding to 631106653 its reverse (356601136), we get a palindrome (987707789).

The spelling of 631106653 in words is "six hundred thirty-one million, one hundred six thousand, six hundred fifty-three".