86825857 has 4 divisors (see below), whose sum is σ = 86985136. Its totient is φ = 86666580.

The previous prime is 86825833. The next prime is 86825861. The reversal of 86825857 is 75852868.

It is a happy number.

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 86825857 - 2¹¹ = 86823809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86825857.

It is not an unprimeable number, because it can be changed into a prime (86805857) 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 3 ways as a sum of consecutive naturals, for example, 78819 + ... + 79912.

It is an arithmetic number, because the mean of its divisors is an integer number (21746284).

Almost surely, 2^86825857 is an apocalyptic number.

It is an amenable number.

86825857 is a deficient number, since it is larger than the sum of its proper divisors (159279).

86825857 is a wasteful number, since it uses less digits than its factorization.

86825857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159278.

The product of its digits is 1075200, while the sum is 49.

The square root of 86825857 is about 9318.0393323918. The cubic root of 86825857 is about 442.8089187418.

The spelling of 86825857 in words is "eighty-six million, eight hundred twenty-five thousand, eight hundred fifty-seven".