1000631197 has 2 divisors, whose sum is σ = 1000631198. Its totient is φ = 1000631196.

The previous prime is 1000631173. The next prime is 1000631201. The reversal of 1000631197 is 7911360001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 860776921 + 139854276 = 29339^2 + 11826^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000631197 - 2⁷ = 1000631069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000631497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500315598 + 500315599.

It is an arithmetic number, because the mean of its divisors is an integer number (500315599).

Almost surely, 2^1000631197 is an apocalyptic number.

It is an amenable number.

1000631197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000631197 is an equidigital number, since it uses as much as digits as its factorization.

1000631197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 1000631197 is about 31632.7551281895. The cubic root of 1000631197 is about 1000.2103547478.

Adding to 1000631197 its reverse (7911360001), we get a palindrome (8911991198).

The spelling of 1000631197 in words is "one billion, six hundred thirty-one thousand, one hundred ninety-seven".