86709831 has 8 divisors (see below), whose sum is σ = 124506480. Its totient is φ = 53359872.

The previous prime is 86709803. The next prime is 86709871. The reversal of 86709831 is 13890768.

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

It is not a de Polignac number, because 86709831 - 2⁷ = 86709703 is a prime.

It is a super-2 number, since 2×86709831² = 15037189584097122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86709871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1111626 + ... + 1111703.

It is an arithmetic number, because the mean of its divisors is an integer number (15563310).

Almost surely, 2^86709831 is an apocalyptic number.

86709831 is a deficient number, since it is larger than the sum of its proper divisors (37796649).

86709831 is a wasteful number, since it uses less digits than its factorization.

86709831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223345.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 86709831 is about 9311.8113705122. The cubic root of 86709831 is about 442.6115879324.

The spelling of 86709831 in words is "eighty-six million, seven hundred nine thousand, eight hundred thirty-one".