631401203 has 2 divisors, whose sum is σ = 631401204. Its totient is φ = 631401202.

The previous prime is 631401187. The next prime is 631401257. The reversal of 631401203 is 302104136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 631401203 - 2⁴ = 631401187 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (631401283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315700601 + 315700602.

It is an arithmetic number, because the mean of its divisors is an integer number (315700602).

Almost surely, 2^631401203 is an apocalyptic number.

631401203 is a deficient number, since it is larger than the sum of its proper divisors (1).

631401203 is an equidigital number, since it uses as much as digits as its factorization.

631401203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 631401203 is about 25127.6979248000. The cubic root of 631401203 is about 857.8969720872.

Adding to 631401203 its reverse (302104136), we get a palindrome (933505339).

The spelling of 631401203 in words is "six hundred thirty-one million, four hundred one thousand, two hundred three".