86850521 has 4 divisors (see below), whose sum is σ = 87370752. Its totient is φ = 86330292.

The previous prime is 86850493. The next prime is 86850523. The reversal of 86850521 is 12505868.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86850521 - 2⁶ = 86850457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86850523) 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, 259865 + ... + 260198.

It is an arithmetic number, because the mean of its divisors is an integer number (21842688).

Almost surely, 2^86850521 is an apocalyptic number.

It is an amenable number.

86850521 is a deficient number, since it is larger than the sum of its proper divisors (520231).

86850521 is a wasteful number, since it uses less digits than its factorization.

86850521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520230.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 86850521 is about 9319.3626928026. The cubic root of 86850521 is about 442.8508432928.

The spelling of 86850521 in words is "eighty-six million, eight hundred fifty thousand, five hundred twenty-one".