117842587 has 2 divisors, whose sum is σ = 117842588. Its totient is φ = 117842586.

The previous prime is 117842581. The next prime is 117842591. The reversal of 117842587 is 785248711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117842587 - 2¹⁵ = 117809819 is a prime.

It is not a weakly prime, because it can be changed into another prime (117842581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58921293 + 58921294.

It is an arithmetic number, because the mean of its divisors is an integer number (58921294).

Almost surely, 2^117842587 is an apocalyptic number.

117842587 is a deficient number, since it is larger than the sum of its proper divisors (1).

117842587 is an equidigital number, since it uses as much as digits as its factorization.

117842587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 125440, while the sum is 43.

The square root of 117842587 is about 10855.5325525743. The cubic root of 117842587 is about 490.2686115742.

The spelling of 117842587 in words is "one hundred seventeen million, eight hundred forty-two thousand, five hundred eighty-seven".