636973097 has 2 divisors, whose sum is σ = 636973098. Its totient is φ = 636973096.

The previous prime is 636973079. The next prime is 636973189. The reversal of 636973097 is 790379636.

Together with previous prime (636973079) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 600201001 + 36772096 = 24499^2 + 6064^2 .

It is a cyclic number.

It is not a de Polignac number, because 636973097 - 2¹² = 636969001 is a prime.

It is not a weakly prime, because it can be changed into another prime (636973067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318486548 + 318486549.

It is an arithmetic number, because the mean of its divisors is an integer number (318486549).

Almost surely, 2^636973097 is an apocalyptic number.

It is an amenable number.

636973097 is a deficient number, since it is larger than the sum of its proper divisors (1).

636973097 is an equidigital number, since it uses as much as digits as its factorization.

636973097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1285956, while the sum is 50.

The square root of 636973097 is about 25238.3259547855. The cubic root of 636973097 is about 860.4131316842.

The spelling of 636973097 in words is "six hundred thirty-six million, nine hundred seventy-three thousand, ninety-seven".