87787117 has 16 divisors (see below), whose sum is σ = 98318592. Its totient is φ = 77699520.

The previous prime is 87787097. The next prime is 87787121. The reversal of 87787117 is 71178778.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 87787117 - 2⁷ = 87786989 is a prime.

It is a super-2 number, since 2×87787117² = 15413155822343378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87787517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142903 + ... + 143515.

It is an arithmetic number, because the mean of its divisors is an integer number (6144912).

Almost surely, 2^87787117 is an apocalyptic number.

It is an amenable number.

87787117 is a deficient number, since it is larger than the sum of its proper divisors (10531475).

87787117 is a wasteful number, since it uses less digits than its factorization.

87787117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948.

The product of its digits is 153664, while the sum is 46.

The square root of 87787117 is about 9369.4779470363. The cubic root of 87787117 is about 444.4370561110.

The spelling of 87787117 in words is "eighty-seven million, seven hundred eighty-seven thousand, one hundred seventeen".