195631001 has 2 divisors, whose sum is σ = 195631002. Its totient is φ = 195631000.

The previous prime is 195630997. The next prime is 195631039. The reversal of 195631001 is 100136591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184307776 + 11323225 = 13576^2 + 3365^2 .

It is a cyclic number.

It is not a de Polignac number, because 195631001 - 2² = 195630997 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (195631081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97815500 + 97815501.

It is an arithmetic number, because the mean of its divisors is an integer number (97815501).

Almost surely, 2^195631001 is an apocalyptic number.

It is an amenable number.

195631001 is a deficient number, since it is larger than the sum of its proper divisors (1).

195631001 is an equidigital number, since it uses as much as digits as its factorization.

195631001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 195631001 is about 13986.8152558043. The cubic root of 195631001 is about 580.5138144027.

Adding to 195631001 its reverse (100136591), we get a palindrome (295767592).

The spelling of 195631001 in words is "one hundred ninety-five million, six hundred thirty-one thousand, one".