636967 has 2 divisors, whose sum is σ = 636968. Its totient is φ = 636966.

The previous prime is 636953. The next prime is 636983. The reversal of 636967 is 769636.

636967 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-636967 is a prime.

It is an alternating number because its digits alternate between even and odd.

636967 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (636917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318483 + 318484.

It is an arithmetic number, because the mean of its divisors is an integer number (318484).

2⁶³⁶⁹⁶⁷ is an apocalyptic number.

636967 is a deficient number, since it is larger than the sum of its proper divisors (1).

636967 is an equidigital number, since it uses as much as digits as its factorization.

636967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 37.

The square root of 636967 is about 798.1021237912. The cubic root of 636967 is about 86.0410386432.

The spelling of 636967 in words is "six hundred thirty-six thousand, nine hundred sixty-seven".