86720899729 has 8 divisors (see below), whose sum is σ = 88022777888. Its totient is φ = 85419243360.

The previous prime is 86720899717. The next prime is 86720899747. The reversal of 86720899729 is 92799802768.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 86720899729 - 2²⁹ = 86184028817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86720899709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 840109 + ... + 937669.

It is an arithmetic number, because the mean of its divisors is an integer number (11002847236).

Almost surely, 2^86720899729 is an apocalyptic number.

It is an amenable number.

86720899729 is a deficient number, since it is larger than the sum of its proper divisors (1301878159).

86720899729 is a wasteful number, since it uses less digits than its factorization.

86720899729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110895.

The product of its (nonzero) digits is 54867456, while the sum is 67.

The spelling of 86720899729 in words is "eighty-six billion, seven hundred twenty million, eight hundred ninety-nine thousand, seven hundred twenty-nine".