636973067 has 2 divisors, whose sum is σ = 636973068. Its totient is φ = 636973066.

The previous prime is 636973049. The next prime is 636973079. The reversal of 636973067 is 760379636.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 636973067 - 2²² = 632778763 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (636973097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318486533 + 318486534.

It is an arithmetic number, because the mean of its divisors is an integer number (318486534).

Almost surely, 2^636973067 is an apocalyptic number.

636973067 is a deficient number, since it is larger than the sum of its proper divisors (1).

636973067 is an equidigital number, since it uses as much as digits as its factorization.

636973067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 47.

The square root of 636973067 is about 25238.3253604513. The cubic root of 636973067 is about 860.4131181763.

The spelling of 636973067 in words is "six hundred thirty-six million, nine hundred seventy-three thousand, sixty-seven".