86721511 has 8 divisors (see below), whose sum is σ = 88482240. Its totient is φ = 84978432.

The previous prime is 86721499. The next prime is 86721577. The reversal of 86721511 is 11512768.

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 86721511 - 2¹¹ = 86719463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86721581) 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, 5746 + ... + 14368.

It is an arithmetic number, because the mean of its divisors is an integer number (11060280).

Almost surely, 2^86721511 is an apocalyptic number.

86721511 is a deficient number, since it is larger than the sum of its proper divisors (1760729).

86721511 is a wasteful number, since it uses less digits than its factorization.

86721511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8825.

The product of its digits is 3360, while the sum is 31.

The square root of 86721511 is about 9312.4385098641. The cubic root of 86721511 is about 442.6314606165.

The spelling of 86721511 in words is "eighty-six million, seven hundred twenty-one thousand, five hundred eleven".