631543117 has 2 divisors, whose sum is σ = 631543118. Its totient is φ = 631543116.

The previous prime is 631543091. The next prime is 631543153. The reversal of 631543117 is 711345136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 544475556 + 87067561 = 23334^2 + 9331^2 .

It is a cyclic number.

It is not a de Polignac number, because 631543117 - 2¹¹ = 631541069 is a prime.

It is a Chen prime.

It is equal to p_32883430 and since 631543117 and 32883430 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631541117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315771558 + 315771559.

It is an arithmetic number, because the mean of its divisors is an integer number (315771559).

Almost surely, 2^631543117 is an apocalyptic number.

It is an amenable number.

631543117 is a deficient number, since it is larger than the sum of its proper divisors (1).

631543117 is an equidigital number, since it uses as much as digits as its factorization.

631543117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 31.

The square root of 631543117 is about 25130.5216221232. The cubic root of 631543117 is about 857.9612410338.

The spelling of 631543117 in words is "six hundred thirty-one million, five hundred forty-three thousand, one hundred seventeen".