86905869 has 4 divisors (see below), whose sum is σ = 115874496. Its totient is φ = 57937244.

The previous prime is 86905817. The next prime is 86905909. The reversal of 86905869 is 96850968.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86905869 - 2⁸ = 86905613 is a prime.

It is a super-2 number, since 2×86905869² = 15105260133290322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86905969) 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 3 ways as a sum of consecutive naturals, for example, 14484309 + ... + 14484314.

It is an arithmetic number, because the mean of its divisors is an integer number (28968624).

Almost surely, 2^86905869 is an apocalyptic number.

It is an amenable number.

86905869 is a deficient number, since it is larger than the sum of its proper divisors (28968627).

86905869 is a wasteful number, since it uses less digits than its factorization.

86905869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28968626.

The product of its (nonzero) digits is 933120, while the sum is 51.

The square root of 86905869 is about 9322.3317362128. The cubic root of 86905869 is about 442.9448964747.

The spelling of 86905869 in words is "eighty-six million, nine hundred five thousand, eight hundred sixty-nine".