86821503 has 8 divisors (see below), whose sum is σ = 115814016. Its totient is φ = 57855000.

The previous prime is 86821487. The next prime is 86821517. The reversal of 86821503 is 30512868.

It is a happy number.

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

It is not a de Polignac number, because 86821503 - 2⁴ = 86821487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86821543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3478 + ... + 13628.

It is an arithmetic number, because the mean of its divisors is an integer number (14476752).

Almost surely, 2^86821503 is an apocalyptic number.

86821503 is a deficient number, since it is larger than the sum of its proper divisors (28992513).

86821503 is a wasteful number, since it uses less digits than its factorization.

86821503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13005.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 86821503 is about 9317.8056966219. The cubic root of 86821503 is about 442.8015168674.

The spelling of 86821503 in words is "eighty-six million, eight hundred twenty-one thousand, five hundred three".