86824257 has 12 divisors (see below), whose sum is σ = 125356464. Its totient is φ = 53430000.

The previous prime is 86824193. The next prime is 86824261. The reversal of 86824257 is 75242868.

It is a happy number.

It is not a de Polignac number, because 86824257 - 2⁶ = 86824193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86824657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85119 + ... + 86132.

It is an arithmetic number, because the mean of its divisors is an integer number (10446372).

Almost surely, 2^86824257 is an apocalyptic number.

It is an amenable number.

86824257 is a deficient number, since it is larger than the sum of its proper divisors (38532207).

86824257 is a wasteful number, since it uses less digits than its factorization.

86824257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171280 (or 171267 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The square root of 86824257 is about 9317.9534770249. The cubic root of 86824257 is about 442.8061987432.

The spelling of 86824257 in words is "eighty-six million, eight hundred twenty-four thousand, two hundred fifty-seven".