86921503859 has 2 divisors, whose sum is σ = 86921503860. Its totient is φ = 86921503858.

The previous prime is 86921503847. The next prime is 86921503861. The reversal of 86921503859 is 95830512968.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86921503859 - 2¹⁶ = 86921438323 is a prime.

It is a super-2 number, since 2×86921503859² (a number of 23 digits) contains 22 as substring.

Together with 86921503861, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86921503819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43460751929 + 43460751930.

It is an arithmetic number, because the mean of its divisors is an integer number (43460751930).

Almost surely, 2^86921503859 is an apocalyptic number.

86921503859 is a deficient number, since it is larger than the sum of its proper divisors (1).

86921503859 is an equidigital number, since it uses as much as digits as its factorization.

86921503859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4665600, while the sum is 56.

The spelling of 86921503859 in words is "eighty-six billion, nine hundred twenty-one million, five hundred three thousand, eight hundred fifty-nine".