87728117 has 2 divisors, whose sum is σ = 87728118. Its totient is φ = 87728116.

The previous prime is 87728107. The next prime is 87728153. The reversal of 87728117 is 71182778.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77545636 + 10182481 = 8806^2 + 3191^2 .

It is a cyclic number.

It is not a de Polignac number, because 87728117 - 2¹⁶ = 87662581 is a prime.

It is a super-3 number, since 3×87728117³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87728107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43864058 + 43864059.

It is an arithmetic number, because the mean of its divisors is an integer number (43864059).

Almost surely, 2^87728117 is an apocalyptic number.

It is an amenable number.

87728117 is a deficient number, since it is larger than the sum of its proper divisors (1).

87728117 is an equidigital number, since it uses as much as digits as its factorization.

87728117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43904, while the sum is 41.

The square root of 87728117 is about 9366.3288966382. The cubic root of 87728117 is about 444.3374679869.

The spelling of 87728117 in words is "eighty-seven million, seven hundred twenty-eight thousand, one hundred seventeen".