86821903 has 8 divisors (see below), whose sum is σ = 100340640. Its totient is φ = 73582080.

The previous prime is 86821877. The next prime is 86821913. The reversal of 86821903 is 30912868.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86821903 - 2⁵ = 86821871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86821913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69058 + ... + 70303.

It is an arithmetic number, because the mean of its divisors is an integer number (12542580).

Almost surely, 2^86821903 is an apocalyptic number.

86821903 is a deficient number, since it is larger than the sum of its proper divisors (13518737).

86821903 is a wasteful number, since it uses less digits than its factorization.

86821903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139457.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 86821903 is about 9317.8271608782. The cubic root of 86821903 is about 442.8021968846.

It can be divided in two parts, 8682 and 1903, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 86821903 in words is "eighty-six million, eight hundred twenty-one thousand, nine hundred three".