86196781 has 8 divisors (see below), whose sum is σ = 94101984. Its totient is φ = 78303120.

The previous prime is 86196779. The next prime is 86196793. The reversal of 86196781 is 18769168.

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 86196781 - 2¹ = 86196779 is a prime.

It is a super-2 number, since 2×86196781² = 14859770109523922, 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 (86196181) 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, 22455 + ... + 26011.

It is an arithmetic number, because the mean of its divisors is an integer number (11762748).

Almost surely, 2^86196781 is an apocalyptic number.

It is an amenable number.

86196781 is a deficient number, since it is larger than the sum of its proper divisors (7905203).

86196781 is a wasteful number, since it uses less digits than its factorization.

86196781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5771.

The product of its digits is 145152, while the sum is 46.

The square root of 86196781 is about 9284.2221537402. Note that the first 3 decimals coincide. The cubic root of 86196781 is about 441.7369034772.

It can be divided in two parts, 8619 and 6781, that added together give a triangular number (15400 = T₁₇₅).

The spelling of 86196781 in words is "eighty-six million, one hundred ninety-six thousand, seven hundred eighty-one".