86868032921 has 8 divisors (see below), whose sum is σ = 87520028904. Its totient is φ = 86216296960.

The previous prime is 86868032843. The next prime is 86868032969. The reversal of 86868032921 is 12923086868.

It can be written as a sum of positive squares in 4 ways, for example, as 1133264896 + 85734768025 = 33664^2 + 292805^2 .

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 86868032921 - 2³⁰ = 85794291097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86868022921) 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, 633701 + ... + 758493.

It is an arithmetic number, because the mean of its divisors is an integer number (10940003613).

Almost surely, 2^86868032921 is an apocalyptic number.

It is an amenable number.

86868032921 is a deficient number, since it is larger than the sum of its proper divisors (651995983).

86868032921 is a wasteful number, since it uses less digits than its factorization.

86868032921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130011.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 86868032921 in words is "eighty-six billion, eight hundred sixty-eight million, thirty-two thousand, nine hundred twenty-one".