631421411 has 2 divisors, whose sum is σ = 631421412. Its totient is φ = 631421410.

The previous prime is 631421407. The next prime is 631421459. The reversal of 631421411 is 114124136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 631421411 - 2² = 631421407 is a prime.

It is not a weakly prime, because it can be changed into another prime (631421491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315710705 + 315710706.

It is an arithmetic number, because the mean of its divisors is an integer number (315710706).

Almost surely, 2^631421411 is an apocalyptic number.

631421411 is a deficient number, since it is larger than the sum of its proper divisors (1).

631421411 is an equidigital number, since it uses as much as digits as its factorization.

631421411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 631421411 is about 25128.1000276583. The cubic root of 631421411 is about 857.9061243224.

Adding to 631421411 its reverse (114124136), we get a palindrome (745545547).

The spelling of 631421411 in words is "six hundred thirty-one million, four hundred twenty-one thousand, four hundred eleven".