163906087 has 2 divisors, whose sum is σ = 163906088. Its totient is φ = 163906086.

The previous prime is 163906081. The next prime is 163906091. The reversal of 163906087 is 780609361.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163906087 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163906081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81953043 + 81953044.

It is an arithmetic number, because the mean of its divisors is an integer number (81953044).

Almost surely, 2^163906087 is an apocalyptic number.

163906087 is a deficient number, since it is larger than the sum of its proper divisors (1).

163906087 is an equidigital number, since it uses as much as digits as its factorization.

163906087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 163906087 is about 12802.5812631672. The cubic root of 163906087 is about 547.2658654297.

The spelling of 163906087 in words is "one hundred sixty-three million, nine hundred six thousand, eighty-seven".