87817141 has 6 divisors (see below), whose sum is σ = 90742326. Its totient is φ = 84983400.

The previous prime is 87817129. The next prime is 87817153. The reversal of 87817141 is 14171878.

It is an interprime number because it is at equal distance from previous prime (87817129) and next prime (87817153).

It can be written as a sum of positive squares in only one way, i.e., 83631025 + 4186116 = 9145^2 + 2046^2 .

It is not a de Polignac number, because 87817141 - 2¹⁵ = 87784373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87817141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87817241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44730 + ... + 46651.

It is an arithmetic number, because the mean of its divisors is an integer number (15123721).

Almost surely, 2^87817141 is an apocalyptic number.

It is an amenable number.

87817141 is a deficient number, since it is larger than the sum of its proper divisors (2925185).

87817141 is an equidigital number, since it uses as much as digits as its factorization.

87817141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91443 (or 91412 counting only the distinct ones).

The product of its digits is 12544, while the sum is 37.

The square root of 87817141 is about 9371.0800338061. The cubic root of 87817141 is about 444.4877175204.

The spelling of 87817141 in words is "eighty-seven million, eight hundred seventeen thousand, one hundred forty-one".