117861563 has 2 divisors, whose sum is σ = 117861564. Its totient is φ = 117861562.

The previous prime is 117861547. The next prime is 117861619. The reversal of 117861563 is 365168711.

It is a weak prime.

It is an emirp because it is prime and its reverse (365168711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117861563 - 2⁴ = 117861547 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (117860563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58930781 + 58930782.

It is an arithmetic number, because the mean of its divisors is an integer number (58930782).

Almost surely, 2^117861563 is an apocalyptic number.

117861563 is a deficient number, since it is larger than the sum of its proper divisors (1).

117861563 is an equidigital number, since it uses as much as digits as its factorization.

117861563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The square root of 117861563 is about 10856.4065417614. The cubic root of 117861563 is about 490.2949258807.

The spelling of 117861563 in words is "one hundred seventeen million, eight hundred sixty-one thousand, five hundred sixty-three".