86020781 has 8 divisors (see below), whose sum is σ = 107246784. Its totient is φ = 67029120.

The previous prime is 86020721. The next prime is 86020789. The reversal of 86020781 is 18702068.

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 86020781 - 2⁶ = 86020717 is a prime.

It is a super-2 number, since 2×86020781² = 14799149527699922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86020789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558500 + ... + 558653.

It is an arithmetic number, because the mean of its divisors is an integer number (13405848).

Almost surely, 2^86020781 is an apocalyptic number.

It is an amenable number.

86020781 is a deficient number, since it is larger than the sum of its proper divisors (21226003).

86020781 is a wasteful number, since it uses less digits than its factorization.

86020781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117171.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 86020781 is about 9274.7388642484. The cubic root of 86020781 is about 441.4360466511.

The spelling of 86020781 in words is "eighty-six million, twenty thousand, seven hundred eighty-one".