108641287 has 4 divisors (see below), whose sum is σ = 111577576. Its totient is φ = 105705000.

The previous prime is 108641249. The next prime is 108641303. The reversal of 108641287 is 782146801.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 108641287 - 2¹⁵ = 108608519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 2936251 = 108641287 / (1 + 0 + 8 + 6 + 4 + 1 + 2 + 8 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108641227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1468089 + ... + 1468162.

It is an arithmetic number, because the mean of its divisors is an integer number (27894394).

Almost surely, 2^108641287 is an apocalyptic number.

108641287 is a deficient number, since it is larger than the sum of its proper divisors (2936289).

108641287 is an equidigital number, since it uses as much as digits as its factorization.

108641287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2936288.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 108641287 is about 10423.1131146122. The cubic root of 108641287 is about 477.1610298601.

The spelling of 108641287 in words is "one hundred eight million, six hundred forty-one thousand, two hundred eighty-seven".