631232429 has 2 divisors, whose sum is σ = 631232430. Its totient is φ = 631232428.

The previous prime is 631232377. The next prime is 631232443. The reversal of 631232429 is 924232136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 616777225 + 14455204 = 24835^2 + 3802^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631232429 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 631232395 and 631232404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631238429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315616214 + 315616215.

It is an arithmetic number, because the mean of its divisors is an integer number (315616215).

Almost surely, 2^631232429 is an apocalyptic number.

It is an amenable number.

631232429 is a deficient number, since it is larger than the sum of its proper divisors (1).

631232429 is an equidigital number, since it uses as much as digits as its factorization.

631232429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 32.

The square root of 631232429 is about 25124.3393743995. The cubic root of 631232429 is about 857.8205264476.

The spelling of 631232429 in words is "six hundred thirty-one million, two hundred thirty-two thousand, four hundred twenty-nine".