86500621 has 2 divisors, whose sum is σ = 86500622. Its totient is φ = 86500620.

The previous prime is 86500577. The next prime is 86500639. The reversal of 86500621 is 12600568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44756100 + 41744521 = 6690^2 + 6461^2 .

It is a cyclic number.

It is not a de Polignac number, because 86500621 - 2¹³ = 86492429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86500621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86500721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43250310 + 43250311.

It is an arithmetic number, because the mean of its divisors is an integer number (43250311).

Almost surely, 2^86500621 is an apocalyptic number.

It is an amenable number.

86500621 is a deficient number, since it is larger than the sum of its proper divisors (1).

86500621 is an equidigital number, since it uses as much as digits as its factorization.

86500621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 86500621 is about 9300.5710039760. The cubic root of 86500621 is about 442.2553294317.

The spelling of 86500621 in words is "eighty-six million, five hundred thousand, six hundred twenty-one".